GB/T594-1983船用外螺纹锻钢截止阀|介绍特点分类使用_上海首龙【TC品牌】阀门
GB/T594-1983船用外螺纹锻钢截止阀
Marine Forged Steel Male Thread Stop Valve
GB/T595-1983船用外螺纹青铜截止阀
Marine Bronze Male Thread Stop Valve

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