The copper-cored cable surrounded by a heavy shielding is Coaxial Cable.
What is a Coaxial Cable?
A Coaxial cable or coax is a type of electrical cable that has an inner conductor surrounded by a tubular insulating layer and a tubular conducting shield. It also conducts electrical signals using an inner conductor surrounded by an insulating layer and all enclosed by a shield, most likely one to four layers of woven metallic braid and metallic tape.
What it is used for?
Coaxial cable is a versatile transmission medium, used in a wide variety of applications. It is used to transmit lines for radio frequency, long-distance telephone transmission, local area network, and cable television distribution.
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