copper piece的用法和样例：
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。
copper piece的相关资料：
临近单词
copperware
copper
copper electrolysis wastewater
copper-aluminium welding rod
copper covered steel conductor
copper acetate meta-arsenite
Copper Pipe Links Copper Plats
copper ion selective electrode
Copper and Copper Alloy Powder
copper oxide photovoltaic cell
copper mine in Yunnan province
Copper alloys casting additive
