Wires and cables mainly include bare wires, high-temperature cables, insulated cables for motor electrical purposes, low-voltage cables, power cables and optical cables. An electric cable refers to a material used for power transmission and distribution, communication, and related data transmission purposes. There is no strict boundary between "wires" and "cables". Generally speaking, products with fewer cores, smaller cross-sectional areas and simpler structures are called wires. Those without insulation are called bare wires, and the rest are called cables. Conductors with a large cross-sectional area (greater than 6 square millimeters) are called large wires, while those with a smaller cross-sectional area (less than or equal to 6 square millimeters) are called small wires. Insulated wires are also known as building wires. Cables mainly include bare wires, electromagnetic wires, insulated cables for motors and electrical appliances, high-voltage cables, communication optical cables and power cables. Cables include high-voltage cables, variable-frequency cables, compensating cables, shielded cables, high-temperature cables, computer cables, signal cables, coaxial cables, fire-resistant cables, Marine cables, etc. They are all composed of multiple strands of transmission lines and are used to connect integrated operational amplifiers, electrical systems, etc.