GB1241-1983船用外螺纹锻钢截止止回阀|介绍特点分类使用_上海首龙【TC品牌】阀门
GB1241-1983船用外螺纹锻钢截止止回阀
Marine Forged Steel Male Thread Stop Check Valve
GB/T596-1983船用外螺纹青铜截止止回阀
Marine Bronze Male Thread Stop Check Valve

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