2. Peel off the network cable batch to see how bright the copper wire is inside. Generally speaking, if the network cable is made of recycled waste copper, or the copper used contains more impurities, the brightness of the network cable will be a little gray, just like the phenomenon that copper is oxidized. If it is a genuine network cable, its luster will be very bright, and it is six copper wires, each of which is so bright.
呆在京城，每天就在街上晃荡，怕这些家伙都展不开手脚了。
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