Unverified80% confidenceFactTime unknown
判断电线真伪可看绝缘层:国标绝缘层厚度均匀(2.5平方约0.8mm),用力反复弯折10次不开裂发白;劣质PVC绝缘薄脆易裂、有刺鼻气味
1
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80%
Confidence
Long-term
Relevance
-
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