Cables, which are generally considered to be cables made from one or more insulated conductors that are insulated and protected from one place to another by transmitting electricity or information.

Broadly speaking, it refers to a device that transmits electrical signals by means of a metal medium. By definition, a cable is used to conduct electricity.

It is generally made from the following metals: Copper conductivity is second only to silver, the thermal conductivity is second only to gold, silver, corrosion-resistant, non-magnetic, plastic good, easy to weld, widely used.

Copper alloy is mainly to improve the wear resistance of copper, corrosion resistance and mechanical physical properties.

Silver, metal conductivity and thermal conductivity of the highest, with good corrosion resistance and oxidation resistance, easy to weld; mainly used for coating and cladding layer;

Gold, nickel, used as a heat resistant line.

Iron (steel), often used as a composite conductor of reinforcing materials, such as steel core aluminum wire, copper clad steel, aluminum clad steel wire and so on.

Zinc, used as a coating for wire/steel/iron conductors, to prevent corrosion.

Tin, used for wire/copper plating, to prevent corrosion and to facilitate the welding of copper wire.

Fiber Optical fiber is a shorthand for optical fibers, a light conduction tool that is achieved by the principle of total reflection in a fiber made of glass or plastic.

Charles Kao and George A. Hockham, former president of the Chinese University of Hong Kong, first put forward the idea that optical fiber could be used for communication transmission, Charles Kao won the 2009 Nobel Prize in Physics.

The transmitter at one end of the optical fiber transmits the light pulse to the optical fiber using light emitting diode,led or a laser beam, and the receiving device at the other end of the fiber uses a photosensitive element to detect pulses. In daily life, optical fiber is used as a long-distance information transmission because the conduction loss of light in optical fiber is much lower than that of electricity in wire conduction.