Brass (Brass) : Brass is an alloy of copper and zinc, general zinc content in the 30 to 40%, the color of the Brass between with the increase of the content of zinc from dark red.

黄铜(Brass)：黄铜是铜和锌的合金，一般锌含量在30 ~ 40%之间，黄铜的颜色随锌含量的增加从暗红色。

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Valve Body, Cover, Tailpiece and Control Stop shall be in conformance with ASTM Alloy Classification for Semi-Red Brass.

阀体、阀盖、附属件和控制止回阀均符合美国材料试验协会ASTM的半红铜合金分类标准。

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