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承插焊 材质: a182-f11 【产品名称:高压自密封截止阀】 【产品型号
j61y2500lb锻钢自密封锻钢截止阀a105n高温高压承插焊手动截止
j61y160pj61y250p不锈钢承插焊针型阀高压对焊截止阀仪表阀
fj61w160p不锈钢承插焊针型阀套焊式手动截止阀sw电厂用一次门
厂家直销美标碳钢,不锈钢等800lb承插焊截止阀 j61h
承插焊 材质: a182-f11 【产品名称:高压自密封截止阀】 【产品型号