Possibly they first found native copper and hammered it into shape .

可能他们最初找到的是生铜，把它锤击成形。

youdao

Is a profession to produce high, inside file native copper bathroom series.

是一家专业生产高、中档纯铜卫浴系列。

youdao

Is a profession to produce high, inside file native copper bathroom series.

是一家专业生产高、中档纯铜卫浴系列。

youdao