Rated Voltage: The rated voltage of this cable is 450/750V, where 450V refers to the voltage to ground of the cable, and 750V is the line-to-line voltage. This voltage level enables it to meet the power supply requirements of most low-voltage electrical systems and is suitable for AC circuits with 50Hz or 60Hz. Whether it is small and medium-sized motors in industrial production, lighting and power systems in commercial buildings, or various electrical appliances in households, their working voltages are within this range, so the cable has wide applicability.
Conductor Cross-Sectional Area and Current-Carrying Capacity: The conductor cross-sectional area is 6mm², which is carefully designed according to the power requirements of electrical equipment and current transmission efficiency. At an ambient temperature of 30°C, its continuous current-carrying capacity can reach about 32A. This means it can be adapted to various medium and high-power electrical equipment, such as three-phase motors with a power of about 7kW and single-phase electrical appliances with a power of about 5kW, ensuring that the cable will not overheat due to overload during the operation of the equipment and guaranteeing electrical safety.
Conductor Structure and Resistance: The conductor is made of multiple strands of Copper Wires stranded together, usually dozens of fine copper wires with a diameter of about 0.2-0.3mm woven according to a specific stranding pitch. This stranded structure has many advantages. It not only enhances the Flexibility of the cable, enabling it to be easily bent and laid in complex spaces such as narrow wall gaps and internal corners of equipment, reducing construction difficulty, but also improves the fatigue resistance of the conductor. During long-term use, even after multiple bendings and vibrations, it is not easy to break, thereby extending the service life of the cable. At a standard ambient temperature of 20°C, the maximum resistance of the conductor does not exceed 3.08Ω/km. The low resistance value ensures efficient current transmission, reduces energy loss during transmission, and also reduces the heat generated due to excessive resistance, further improving the safety of the cable in use.
Insulation Layer Parameters: The insulation layer is made of PVC material, with a thickness precisely controlled between 1.0-1.2mm. This thickness design not only ensures good electrical insulation performance, which can effectively isolate current and prevent leakage and short-circuit accidents between the cable and other conductors, but also reduces the weight of the cable to a certain extent, facilitating installation and laying. At room temperature, the insulation resistance of the insulation layer is greater than 100MΩ·km. This high-performance index ensures that during long-term use, the insulation layer will not deteriorate due to aging, moisture, etc., and always maintain a stable insulation effect. In addition, the insulation layer also has a certain withstand voltage strength, which can withstand the electrical stress under the rated voltage and avoid breakdown.
Cable Outer Diameter: The outer diameter of the cable is about 5.5-6.0mm. This size is optimally designed to be compatible with conventional wire tubes (such as PVC Wire tubes, metal wire tubes, etc.) and installation channels on the market. In scenarios such as wall embedding, cable tray laying, and internal equipment wiring, it can pass through smoothly, reducing obstacles during installation and improving construction efficiency. At the same time, the small outer diameter also saves installation space, making the line layout more compact and beautiful.
Operating Temperature Range: Its operating temperature range is usually -15°C to 70°C. In cold winters, even if the ambient temperature is as low as -15°C, the conductor and insulation layer of the cable will not become brittle due to low temperature and can still maintain good flexibility and insulation performance. In hot summers or environments with high temperatures near equipment, when the temperature reaches 70°C, the insulation layer will not soften or deform, and the resistance change of the conductor is also within the allowable range, ensuring that the cable can work normally and adapt to temperature conditions in different regions and environments.
Mechanical Properties: The cable has good mechanical strength and can withstand a certain amount of tension and pressure. During laying, appropriate dragging and fixing will not cause conductor breakage or insulation layer damage. It has excellent bending resistance, with a minimum bending radius not less than 6 times the outer diameter of the cable, and can still maintain good performance after repeated bending. At the same time, the insulation layer has certain wear resistance and is not easy to be damaged when rubbing against pipes, walls, etc., ensuring the integrity of the cable.
Industrial Field:
Power Connection of Mechanical Equipment: In industrial production workshops, the power connection of various machine tools (such as lathes, milling machines, grinders, etc.), pump equipment (water pumps, oil pumps), fans and other mechanical equipment often uses this cable. These devices have large power and high requirements for power supply stability. The 6mm² cross-sectional area and 32A current-carrying capacity of this cable can meet their current needs, ensuring the normal operation of the equipment. At the same time, its good flexibility is convenient for wiring in the complex structure inside the equipment, and its fatigue resistance can adapt to the vibration environment during equipment operation.
Electrical Connection of Production Lines: Automated production lines are composed of equipment in multiple processes, and reliable cable connections are required for electrical control and power transmission between various equipment. This cable can be used as the Power Cable of the production line to provide power for various equipment, and also as the connection cable of the control loop to transmit control signals. Its good insulation performance can avoid signal interference and leakage accidents, ensuring the continuous and stable operation of the production line.
Internal Wiring of Control Cabinets: There are a large number of electrical components in industrial control cabinets, such as contactors, relays, circuit breakers, etc. The connection between these components requires the use of appropriate cables. This cable has a small outer diameter and good flexibility, suitable for dense wiring in control cabinets, and the good performance of the insulation layer can prevent short circuits between components, improving the safety and reliability of the control cabinet.
Commercial Building Field:
Wiring of Lighting Systems: The lighting systems in commercial buildings such as shopping malls, office buildings, and hotels are usually large in scale, including various lamps such as downlights, spotlights, and chandeliers. This cable can be used as the wiring of the lighting loop, and its current-carrying capacity can meet the current demand of multiple lamps working at the same time. Insulation layers of various colors (such as white, black, etc.) are convenient for distinguishing different lighting loops, facilitating later maintenance and repair. At the same time, its wide operating temperature range can adapt to the temperature environment of different areas in commercial buildings.
Wiring of Socket Circuits: A large number of sockets are set in offices, conference rooms, public areas and other places in commercial buildings, which are used to connect office equipment such as computers, printers, projectors and small electrical appliances. This cable, as the wiring of the socket circuit, can meet the electricity demand of these equipment. The wear resistance and aging resistance of its insulation layer can ensure that it is not easy to fail during long-term use, ensuring the safety of office electricity.
Power Supply for Large Equipment: The power supply lines of large equipment such as central air-conditioning systems, elevators, and escalators in commercial buildings can also use this cable. These devices have large power and large current fluctuations during startup. The current-carrying capacity and mechanical properties of this cable can withstand these working conditions, ensuring the stable operation of the equipment.
Residential Decoration Field:
Power Supply for High-Power Electrical Appliances: The power supply lines of high-power electrical appliances in residences, such as electric water heaters, air conditioners, electric ovens, microwave ovens, etc., need to use cables with strong current-carrying capacity, and this cable is an ideal choice. The 6mm² cross-sectional area can meet the current demand of these electrical appliances, avoiding fire and other safety accidents caused by cable overload. Its good insulation performance can prevent leakage and protect the personal safety of residents.
Wiring from Household Distribution Box to Each Room: This cable can be used for the main line and branch line wiring from the household distribution box to each room. It can stably transmit electricity to each room to meet the electricity demand of lamps, sockets, etc. in the room. The good flexibility makes it easy to lay in the wire tubes in walls, floors, and ceilings without affecting the beauty of decoration.
Wiring of Smart Home Systems: With the development of smart homes, smart switches, smart sockets, security equipment and other devices in homes need reliable electrical connections. This cable can be used as the power supply and signal transmission line of these devices, and its stable performance can ensure the normal operation of the smart home system.
Outdoor Temporary Power Supply Field:
Temporary Electricity Use in Construction Sites: Construction sites need temporary power supply during construction to drive mixers, electric welders, lighting equipment, etc. This cable can be used as a temporary power supply line, and its good insulation performance and weather resistance (can resist wind and rain erosion to a certain extent) can adapt to the complex environment of construction sites. At the same time, its flexibility is convenient for dragging and arranging on the construction site, meeting the flexibility demand of temporary power supply.
Power Supply for Outdoor Activities: When holding large outdoor activities (such as concerts, sports meetings, exhibitions, etc.), it is necessary to temporarily build a power supply system to supply power for audio equipment, lighting facilities, broadcasting equipment, etc. This cable can be used as a temporary power supply line, and its current-carrying capacity can meet the demand of multiple devices working at the same time. The safety of the insulation layer can ensure the electrical safety of the activity site.
Agricultural Field:
Power Supply for Agricultural Irrigation Equipment: Irrigation pumps, sprinkler irrigation equipment, etc. in farmland need to be driven by electricity. This cable can be used as its power supply line to transmit electricity from the distribution box to the equipment. Its wear resistance and aging resistance adapt to the outdoor environment of farmland, and it is not easy to be damaged even when laid in soil.
Wiring of Electrical Systems in Greenhouses: The electrical connection of temperature control equipment, lighting systems, fertilization equipment, etc. in greenhouses requires the use of appropriate cables. This cable can be used as the wiring of these equipment, and its wide operating temperature range can adapt to the temperature changes in the greenhouse. The insulation performance can prevent leakage accidents in humid environments, ensuring the normal progress of agricultural production.
Conductor Material: The conductor is made of high-purity electrolytic copper with a purity of more than 99.9%. High-purity electrolytic copper has excellent conductivity, and its conductivity is close to that of international standard soft copper (58MS/m), which can ensure minimal loss during current transmission and improve the efficiency of electric energy transmission. This is of great significance for reducing energy waste and operating costs. At the same time, electrolytic copper has good ductility and toughness. During stranding, fine copper wires are not easy to break, which can ensure the integrity and stability of the conductor structure. In addition, copper has good chemical stability and is not easy to be oxidized and corroded in normal use environments. Even in a humid environment, a dense oxide film will form on the copper surface, which can prevent further corrosion of copper, thereby extending the service life of the cable.
Insulation Layer Material: The insulation layer is made of high-quality PVC (polyvinyl chloride) material, which has many excellent characteristics. Firstly, it has excellent insulation performance, which can effectively isolate conductors with different potentials, prevent leakage between the cable and other live bodies, and ensure the safe operation of the electrical system. Secondly, it has strong wear resistance. During the laying, installation and use of the cable, it can resist friction with pipes, walls, ground, etc., protect the internal Copper Conductor from damage, and maintain the integrity of the cable. Thirdly, it has good chemical corrosion resistance, which can resist the erosion of acids, alkalis, salt spray and other chemical substances to a certain extent, and is suitable for environments with slight chemical pollution such as chemical workshops, agricultural greenhouses, and humid basements. Fourthly, it has certain flame retardancy. According to relevant standards, its oxygen index is not less than 27. When exposed to fire, it burns slowly and can self-extinguish after leaving the fire source, which can reduce the risk of fire spread and improve the safety of the cable in case of fire. Fifthly, PVC material has relatively low cost and good processing performance, which is convenient for forming a uniform insulation layer through extrusion process.
Style Design:
Color Options: The insulation layer of the cable provides a variety of colors to choose from, commonly including black, white, gray, blue, etc. Different colors have specific identification meanings, which are convenient for distinguishing the functions of different lines during circuit installation and maintenance. For example, black can be used as the phase line (live wire), blue as the neutral line (zero line), yellow-green two-color (if there is this color model) as the Ground Wire, and white can be used for specific function loops (such as lighting loops, control loops, etc.). Clear color identification can reduce the risk of wiring errors, improve construction efficiency and the safety of the electrical system.
Appearance: The cable is cylindrical overall with a compact structure. Due to the Stranded Conductor structure, its appearance looks softer and more elastic. The surface of the insulation layer is smooth and flat, without obvious protrusions, depressions, bubbles or impurities. This regular appearance is not only convenient for passing through the wire tube during laying, reducing frictional resistance, but also convenient for checking the appearance quality of the cable and timely finding defects in the insulation layer.
Identification Printing: On the surface of the cable's insulation layer, in accordance with relevant international standards and industry specifications, clear identification information is printed. These identifications include the cable's model (H07V2-K), specification (6mm²), rated voltage (450/750V), execution standard (such as EN 50525, etc.), manufacturer's name or trademark, production date, length identification, etc. The identification is printed with wear-resistant ink, which can remain clear after long-term use, facilitating users to identify product specifications, trace product quality, carry out maintenance management and calculate the laying length.
Copper Rod Melting and Casting: Firstly, electrolytic copper raw materials with a purity of more than 99.9% are put into a melting furnace and melted at a high temperature of about 1083°C. During the melting process, impurities (such as oxides, sulfides, metal inclusions, etc.) in the copper liquid are removed by inert gas (such as nitrogen) protection or adding refining agents to improve the purity of the copper liquid. The purified copper liquid is introduced into a continuous casting and rolling machine and cast into a solid copper rod blank with a diameter of 8-12mm. During the casting process, the cooling rate and casting pressure are strictly controlled to ensure that the structure of the copper rod blank is uniform and dense, without pores, cracks and other defects, laying a good foundation for the subsequent wire drawing process.
Copper Wire Drawing: The copper rod blank is drawn through a wire drawing machine for multiple passes to gradually draw the thick copper rod into fine copper wires with a diameter of 0.2-0.3mm. During the wire drawing process, a series of cemented carbide or diamond wire drawing dies with different apertures are used, and the apertures of the dies are gradually reduced in a certain proportion. By controlling the drawing speed (usually 5-20m/s), drawing tension and lubrication cooling system, it is ensured that the copper wire will not deteriorate due to overheating during drawing, and will not break due to excessive tension. After each wire drawing process, the diameter of the copper wire will be reduced precisely until it reaches the required specification. The drawn copper wire needs to be annealed. The copper wire is heated to 300-500°C and kept for a certain time (depending on the diameter of the copper wire) to eliminate the internal stress of the copper wire, improve its flexibility and ductility, and facilitate the subsequent stranding process.
Conductor Stranding: Multiple strands of annealed fine copper wires are stranded through a stranding machine to form a 6mm² Single Core Conductor. During stranding, a reasonable stranding pitch (usually 10-20 times the outer diameter of the conductor) is set according to the diameter and quantity of the fine copper wires to ensure the roundness, flexibility and filling factor of the conductor. The stranding process adopts the untwisting stranding method to ensure that each strand of copper wire is evenly stressed and neatly arranged, avoiding loose strands, broken strands, jumping strands and other phenomena. After stranding, parameters such as the outer diameter, cross-sectional area and DC resistance of the conductor are tested to ensure that they meet the design requirements.
Insulation Layer Extrusion: The stranded conductor is fed into the head of the extruder, and at the same time, PVC Insulation particles (with corresponding color
Cooling and Solidification: The extruded cable immediately enters a cooling water tank for cooling. The cooling water tank is divided into multiple sections, with water temperatures gradually decreasing from high to low (e.g., 60-70°C in the first section and 20-30°C in the last section). A progressive cooling method is adopted to prevent the insulation layer from cracking due to internal stress caused by rapid cooling. The cooled cable insulation layer should have a certain hardness and elasticity, and can rebound quickly when pressed by hand, with a smooth and non-sticky surface.
Spark Test: The cooled cable enters a spark testing machine for insulation performance testing. When the cable passes between the electrodes, the testing machine applies a certain high voltage (usually 2.5-5kV). If there are defects such as pinholes or cracks in the insulation layer, the high voltage will break down the defective area and generate sparks, and the testing machine will immediately alarm and mark the defect location. Operators will repair or reject cables with defects to ensure that the cables leaving the factory have qualified insulation performance.
Marking Printing and Take-up: The cable that passes the spark test is pulled to an online printing device to print product marks on the surface of the insulation layer, including model, specification, rated voltage, execution standard, manufacturer information, etc. The printing uses special ink to ensure that the marks are clear, firm, and wear-resistant. After printing, the cable is pulled to the take-up machine and wound according to the set length (such as 100 meters, 500 meters, 1000 meters). During the take-up process, the take-up tension is controlled to make the cable wound neatly and tightly, avoiding looseness, distortion, knotting, etc.
Finished Product Inspection: The wound cables undergo a comprehensive inspection, including appearance quality (insulation layer color, surface smoothness, mark clarity), dimensional parameters (outer diameter, insulation layer thickness, conductor cross-sectional area), electrical performance (insulation resistance, conductor resistance, voltage withstand strength), mechanical performance (bending resistance, wear resistance), etc. Only products that pass the inspection can enter the final packaging link, and unqualified products will be reworked or scrapped.
Packaging Materials:
Plastic Reels: For long-length cables (such as 500 meters and 1000 meters), plastic reels are usually used for packaging. The reels are made of high-strength polypropylene (PP) material, which has good impact resistance, corrosion resistance, and wear resistance, and can effectively protect the cable from damage during transportation and handling. The reel consists of a central cylinder and two side discs. The diameter of the central cylinder is designed according to the outer diameter of the cable to ensure that the cable can be tightly wound without looseness. The side discs are equipped with reinforcing ribs to enhance the structural strength of the reel and prevent deformation under pressure.
Cartons: Short-length cables (such as 10 meters, 20 meters, 50 meters, and 100 meters) are packaged in cartons. The cartons are made of five-layer corrugated cardboard, which has excellent compressive strength and can withstand the pressure of stacking during storage and transportation. The inner wall of the carton is lined with moisture-proof paper to prevent the cable from being affected by moisture. For cables of 10-50 meters, they are usually coiled into a circular shape and fixed with paper clips to avoid loosening; for 100-meter cables, they are first wound on small plastic spools and then placed in the carton.
Plastic Film: Regardless of the packaging method, the outer layer of the cable is wrapped with a layer of polyethylene plastic film. The plastic film is transparent, which is convenient for checking the appearance and color of the cable without opening the package. It also has good moisture-proof and dust-proof effects, keeping the cable clean and dry during storage and transportation.
Labels and Stickers: Each package is affixed with a label or sticker containing detailed product information, including product name, model (H07V2-K), specification (6mm²), rated voltage (450/750V), color, length, batch number, production date, manufacturer's name, address, and contact information. In addition, there are also identification marks such as "Handle with Care", "Moisture-Proof", and "Stacking Limit" on the package to remind handlers to operate correctly.
Packaging Process:
For Plastic Reel Packaging: The qualified cable after take-up is first wrapped with plastic film to ensure that the entire reel is completely covered. Then, a label is pasted on the side disc of the reel, and the reel is placed on a pallet for centralized storage. When preparing for shipment, the reels are fixed on the pallet with strapping to prevent them from rolling during transportation.
For Carton Packaging: The coiled or spooled cable is placed in the carton, and buffer materials such as foam pads are filled in the gaps to prevent the cable from shaking and colliding in the carton. After closing the carton, it is sealed with tape, and the label is pasted on the front of the carton. Multiple cartons can be stacked on a pallet, and the pallet is wrapped with stretch film to ensure stability.
Transportation Methods:
Road Transportation: It is the most commonly used transportation method, suitable for short and medium distances. The cable is transported by trucks, and the type of truck is selected according to the quantity and packaging of the cable. For small batches of carton-packaged cables, light-duty trucks can be used; for large batches of reel-packaged cables, medium and heavy-duty trucks with flatbeds or containers are used. The truck compartment must be clean, dry, and free of sharp objects to avoid damaging the packaging and the cable.
Railway Transportation: It is suitable for long-distance and large-volume transportation. The cable is usually transported in containers, which can provide a good protective environment, avoiding the influence of weather factors such as rain and snow. Railway transportation has the advantages of large capacity, stable speed, and low cost, which is suitable for bulk goods transportation.
Sea Transportation: It is mainly used for export products or long-distance transportation across regions. The cable is packed in containers, and the container is checked for tightness to prevent seawater or moisture from entering. Sea transportation has a low cost but a long cycle, so it is necessary to reasonably arrange the transportation time to ensure that the goods arrive on schedule.
Transportation Precautions:
Loading and Unloading: Mechanical equipment such as forklifts and cranes should be used for loading and unloading to avoid manual rough handling. When lifting reel-packaged cables, special lifting tools should be used to hook the center hole of the reel to prevent the reel from being damaged. For carton-packaged cables, they should be lifted from the bottom to prevent the carton from being torn. During loading, the cables should be arranged neatly, and the heavy ones should be placed at the bottom and the light ones on top to avoid crushing.
Protection from External Factors: During transportation, the cable should be protected from direct sunlight, rain, and snow. If transported by open trucks, it should be covered with a waterproof and sunshade cloth. In high-temperature weather, attention should be paid to ventilation to prevent the insulation layer from aging due to high temperature; in low-temperature weather, there is no need for special thermal insulation measures because the cable can withstand low temperatures, but it should avoid violent impact to prevent the insulation layer from becoming brittle and cracking.
Prohibition of Mixed Transportation: The cable must not be mixed with flammable, explosive, corrosive, or toxic substances. If it is necessary to transport with other goods, effective isolation measures must be taken to prevent chemical reactions or contamination.
Transportation Documents: Complete transportation documents must be carried during transportation, including waybills, packing lists, quality certificates, etc. The documents should clearly indicate the product name, quantity, destination, consignor, consignee, etc., to ensure smooth customs clearance and delivery.
Order Confirmation: After receiving the user's order, the sales staff will confirm the details with the user again, including product model, specification, color, quantity, delivery address, delivery time, and payment method. For special requirements such as customized lengths or special packaging, it is necessary to communicate with the production and logistics departments to ensure that they can be met.
Inventory Check: The warehouse staff will check the inventory according to the confirmed order. If there is sufficient stock, they will arrange for goods preparation immediately; if there is a shortage, they will notify the production department to arrange production as soon as possible and inform the user of the expected delivery time. During the inventory check, the product's appearance, packaging, and labels are inspected to ensure that the goods are consistent with the order requirements.
Goods Preparation and Inspection: The warehouse staff will pick the corresponding wires according to the order list and conduct a second inspection. The inspection contents include whether the wire's color is correct, whether the length meets the requirements, whether the insulation layer is intact, and whether the packaging is damaged. Unqualified products are strictly prohibited from being delivered.
Delivery Scheduling: The logistics department will formulate a delivery plan according to the delivery address and time requirements, select a suitable transportation method and carrier, and sign a transportation contract with the carrier to clarify the rights and obligations of both parties. For urgent orders, priority is given to arranging transportation to ensure timely delivery.
Notification of Delivery: After the goods are shipped, the sales staff will promptly inform the user of the delivery information, including the carrier's name, waybill number, estimated arrival time, etc., so that the user can track the logistics status.
Sign-in and Confirmation: After the goods arrive at the destination, the user should check the package for damage and the quantity and specifications of the goods. If there is any problem, they should put forward objections in time and contact the manufacturer. If there is no problem, the user signs for receipt, and the delivery process is completed. The manufacturer will record the sign-in information for future reference.
Sample Application: Users can apply for samples through the manufacturer's official website, email, phone, or other channels. When applying, they need to provide basic information such as company name, contact person, contact information, and required product specifications and colors. The manufacturer usually provides free samples, but the user needs to bear the freight.
Sample Preparation: After receiving the sample application, the manufacturer will select qualified products from the same batch as the formal products to make samples. The length of each sample is usually 1-2 meters, which is sufficient for users to conduct tests such as appearance inspection, diameter measurement, and insulation performance testing. The sample's packaging is simple but ensures that the sample is not damaged during transportation.
Sample Delivery: The prepared samples are delivered to the user by express delivery. The manufacturer will track the express information and inform the user of the express number so that the user can check the arrival time.
Sample Feedback: After receiving the samples, users can conduct relevant tests and evaluations. If they have any questions about the samples, such as performance parameters or application methods, they can consult the manufacturer's technical staff. The manufacturer will collect user feedback on the samples to improve products and services.
Quality Guarantee: The manufacturer provides a quality guarantee period for the cable, usually 1-3 years from the date of delivery. During the guarantee period, if the cable has quality problems (such as insulation layer cracking, conductor oxidation, etc.) due to manufacturing defects, the user can apply for repair, replacement, or return with the purchase invoice and quality certificate. The manufacturer will send technical personnel to verify the problem and handle it according to the actual situation.
Technical Support: The manufacturer has a professional technical team to provide users with technical support. Users can consult the technical team about wire selection, installation, use, and maintenance through phone, email, or on-site visits. For example, providing wiring diagrams, explaining the precautions for installation in special environments, and troubleshooting problems encountered during use.
Complaint Handling: If users have complaints about product quality or service, they can reflect them to the manufacturer's after-sales department. The after-sales department will record the complaint content in detail, conduct an investigation within 24 hours, and give a handling plan within 3-5 working days. For reasonable complaints, the manufacturer will actively take measures to compensate for the user's losses and apologize.
Regular Return Visit: The manufacturer will conduct regular return visits to users who have purchased the cable, understand the use of the cable, collect user opinions and suggestions on products and services, and use them as a basis for product improvement and service optimization. Regular return visits can strengthen communication with users and establish long-term cooperative relations.
Hongtai Cable Technology Co.,Ltd
E-mail:export@qlcables.com
sales@qlcables.com
Tel/whatsapp:+86-18032066271
ADD：Xiaokou Industrial Development Zone, Ningjin County, Xingtai City，Hebei Province, China
Copyright © Hongtai Cable Technology Co.,Ltd Technical Support: Ronglida Technology
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