... unify 使成为一体 unqulified 无资格的，无限制的 verify 证明 ...
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What's more, the unqulified wire seems thick on the insulated sheath, the fact is they are made from recycled pvc, the insulation layer will aging and creepage after a period.
另外，伪劣电线绝缘层看上去似乎很厚实，实际上大多是用再生塑料制成的，时间一长，绝缘层会老化而漏电。
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