brief introduction： Each wire of multiple strands of wire, is composed of a number of fine copper wire wire, also called soft wire. Multi-strand wire and single-strand wire difference: the two are similar, mainly, multi-strand wire has two advantages, skin effect - current through the conductor, will concentrate on the performance of the conductor, resulting in a waste of internal space. The greater the current and the higher the frequency, the stronger the skin effect. Multiple strands of wire allow the current to

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