Brass is an alloy of copper and zinc.黄铜是铜锌合金。The worker worked in a little copper with the alloy.工人在合金里搀了一点铜.This is not pure gold ; there is some alloy in it.这不是纯金, 里面混有杂质....
Remove of iron from sulfuric acid leaching solution of ferrochromium alloy by goethite is researched.研究了用针铁矿法从铬铁合金硫酸浸出溶液中除铁并回收铬.Some martensite like bainites such as crossed type and midrib type in the alloy were investi...