copper piece的用法和樣例：
例句
- He was hammering the sheet of copper flat.
他正把銅片錘平。 - Copper plates are imported from Japan,pure silver ingots for plating from Switzerland,and argentic salt and other chemicals from Germany.
採用日本進口的銅片，鍍銀用的瑞士純銀條，西德的銀監及化工原料等等。
copper piece的相關資料：
臨近單詞
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
