copper covered steel 中文意思是什麼
copper covered steel
解釋
銅包鋼-
Specification for copper - covered steel wire for telephone and telegraph purposes
電話和電報用包銅鋼導線規范 -
Copper covered steel wires and copper covered steel stranded conductors ; technical delivery conditions
包銅鋼導線包銅鋼絞線.交貨技術條件 -
Copper covered steel conductor
銅包鋼線
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