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。
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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