calamine brass中文什么意思

异极矿黄铜

• calamine:    n. 1.【矿物】异极矿；碳酸锌矿； ...
• brass:    n. 1.黄铜。 2.〔主 pl.〕 ...
• blue calamine:    绿铜锌矿

百科释义

Calamine brass is brass produced by a particular alloying technique using the zinc ore calamine directly, rather than first refining it to metallic zinc. Zinc smelting is difficult and the pure metal was largely unknown historically, even though the alloyed calamine brass was in use for centuries.