It is available in Brass Plated Black polymer, nickel, zinc etc. on reels or cartons.

它采用黄铜镀黑聚合物，镍，锌等对辘或纸箱。

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It is available in zinc, brass plated black polymer, nickel etc. on reels or cartons.

它有锌，铜镀黑色聚合物，镍等的卷筒或纸箱。

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Iron cover with brass plated, zinc core with two iron keys.

铁套镀铜，锌合金芯，两把铁钥匙！

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Many French horns, for example, are made of nickel silver, an alloy of copper, zinc, and nickel (it's silver in name and color only), and some are made of nickel bronze, an alloy of copper, tin, and nickel. (Brass itself is an alloy of copper and zinc.) Many brass instruments are silver-plated (sterling silver on brass), and some are gold-plated.

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