It mainly includes bare wires, electromagnetic wires, insulated wires for motors and electrical appliances, power cables, communication cables and optical cables. Wires and cables refer to materials used for power, communication and related transmission purposes. There is no strict boundary between "wire" and "cable". Generally, products with few cores, small diameter and simple structure are called wires, those without insulation are called bare wires, and others are called cables; The larger conductor cross-sectional area (greater than 6 mm2) is called large wire, the smaller (less than or equal to 6 mm2) is called small wire, and the insulated wire is also called cloth wire. Wires and cables mainly include bare wires, electromagnetic wires, insulated wires for motors and electrical appliances, power cables, communication cables and optical cables. Cables include power cables, control cables, compensation cables, shielded cables, high-temperature cables, computer cables, signal cables, coaxial cables, fire-resistant cables, marine cables, etc. They are composed of multiple strands of wires, which are used to connect circuits, electrical appliances, etc.