Unverified85% confidenceFactTime unknown
所谓'铜丝球'多数是镀铜铁丝(磁铁能吸住),真正纯铜丝球用磁铁不吸附、断面呈金黄色且久用不锈;镀铜层磨掉后内部铁丝仍会生锈
1
Sources
85%
Confidence
Long-term
Relevance
-
First Seen
Sources
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