DN15-DN2000日标法兰球阀,Q41F-10K,20K,
面议DN15-DN2000日标法兰球阀,Q41F-10K,20K,
面议DN15-DN2000美标法兰球阀Q41F-150LB-600LB,
面议DN15-DN2000意式超薄型球阀Q71F,
面议DN15-DN2000广式内螺纹球阀,Q11F,
面议DN15-DN2000高压对焊球阀,Q61N,Q61F,Q61Y,
面议DN15-DN2000三片式对焊球阀,Q61F,Q61N,
面议DN15-DN2000三片式承插焊球阀,Q61F,Q61N,
面议DN15-DN2000蜗轮法兰连接浮动球阀Q341F,Q341Y,
面议DN15-DN2000锻钢低温球阀,DQ41N,DQ41Y,
面议DN15-DN2000一体式防泄漏球阀,
面议DN15-DN2000PZ73H手动刀型闸阀,刀型闸阀,
面议DN15-DN2000PZ43手动对夹式刀型闸阀,
面议