The dressing of oxidized ore of zinc and lead in Lanping has been a tickler for a long time.
兰坪氧化铅锌矿的选矿长久以来是选矿界的难题。
Copper and zinc are fused to make brass.
铜与锌熔合后形成黄铜。
What we categorized as type 2 medals were manufactured from zinc and very often show visible aging signs.
区分为类型2的勋章是用锌制作的,十分平常地呈现出可见的老化标志。
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