copper piece
英
美
- 铜片
双语例句
- He was hammering the sheet of copper flat.
他正把铜片锤平。 - Copper plates are imported from Japan,pure silver ingots for plating from Switzerland,and argentic salt and other chemicals from Germany.
采用日本进口的铜片，镀银用的瑞士纯银条，西德的银监及化工原料等等。
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