英文:It's a conduit enclosing insulated electric wires.
中文:這是包電線的導管。
英文:A structural unit employed in cable, consisting of four separately insulated conductors twisted together.
中文:電纜使用的一種結構形式,它由四根各自絕緣的導線相互絞合而成。
英文:A type of transmission medium consisting of two insulated wire twisted together to improve its immunity to interference from other(stray) electrical signals that may otherwise corrupt the signal being transmitted.
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