Ropes and cables are mainly used in the fields of ship equipment, fishery fishing, port loading and unloading, electric power construction, petroleum exploration, national defense industry, and sporting goods. Its structure is divided into three strands, eight strands, and twelve strands of cables. The product is widely used, with high strength, low elongation, wear resistance, soft and smooth, and easy operation. Precautions for the use of ropes: Before each use of the ropes, you should carefully check the markings and insert the eyelets. The rope body has no cuts, broken strands, broken wires, kinks and other damaged parts. If there are no abnormalities and defects, It can be used normally; when unrolling the rope, the rope should be released from the end of the rope in the circle, and the rope should be released counterclockwise. If the rope is unfolded counterclockwise, the rope will kinked. If a kink occurs, return the rope to the loop, flip the loop, and then pull the rope from the center. A better method is to unroll the rope on a turntable, at which point the rope can be the pulled from the outer rope end. If a person stands under a tightly tightened rope, danger will occur. Once the rope is out of control, a huge tensile rebound will occur, which may cause casualties. If the rope is unrolled from the rope shaft, the rope shaft itself should rotate freely. It is easy to do this by using a tube through the center of the rope shaft. However, it is prohibited to lay the rope shaft to unroll the rope. The ratio of the diameter D to the diameter d of the rope should exceed 5, but for some high-performance fiber ropes the ratio can reach 20. For ropes, it is recommended that the diameter of the groove of the pulley is 10% -15% larger than the diameter of the rope. If the arc of the rope in contact with the groove is 150 degrees, the rope can achieve the best stress state. To prevent the rope from running out of the pulley. In addition, the pulley should be checked frequently, and the bearings should be regularly maintained to ensure that the pulley rotates smoothly. The rope should be scrapped or discontinued in the following cases: the rope is obviously scorched or melted; the straight line distance is equal to the length of the rope, the surface rope yarn or strand volume is reduced by 10%; the rope leaks at extreme temperature in excess of the range Environment; UV exposure is degraded, the surface of the rope yarn becomes fragmented; the rope appears in the severely damaged hot melt, hardened, flattened area; the number of rope yarns affected by melting or fusion exceeds 20%.