coppering wastewater镀铜废水
after coppering铜盐后处理
coppering bit铜焊头
coppering asbestos铜包石棉环
chemical coppering化学镀铜
basic coppering镀基铜
coppering hammer大头锤;平头锤
skin coppering镀制版铜层
gravure coppering凹版镀铜
N-UNCOUNT（不可数名词） Copper is reddish brown metal that is used to make things such as coins and electrical wires. 铜
Chile is the world's largest producer of copper.
智利是世界上最大的产铜国。
N-COUNT（可数名词） (Often shortened to cop) → a slang word for policeman
ADJ（形容词） Copper is sometimes used to describe things that are reddish-brown in colour. 铜色的 [文学性]
His hair has reverted back to its original copper hue.
他的头发恢复到了原来的铜色。