copper alloy scrap

例句：

1. 1. The scrapmetal was sold for recycling.
   这些废金属被用来回收。
2. 2. Copper alloy scrapis a valuable resource for the construction industry.
   铜合金废料是建筑业的宝贵资源。
3. 3.The scrap metal was used to make newproducts.
   这些废金属被用来制造新产品。