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Do you know how to distinguish the advantages and disadvantages of wire and cable?
Dec 18, 2017

Qualified copper wire copper core should be purple, shiny, feel soft. The fake copper core copper wire is purple black, yellow or white, impurities, poor mechanical strength, poor toughness, a little effort that will break, and the wire is often broken. Check, you just peel off the wire 2cm, and then use a piece of paper on the copper core a little rub, if there is a black substance on the white paper, indicating more impurities in the copper core.

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