內(nèi)螺紋閘閥1主要零件材料:閥體、閥瓣、閥桿、密封、填料密封:304,316填料:聚四氟乙烯閥桿:304,316閥體:WCB 閥瓣:304,316內(nèi)螺紋閘閥1主要零件材料:閥體、閥瓣、閥桿、密封、填料密封:304,316填料:聚四氟乙烯閥桿:304,316閥體:WCB 閥瓣:304,316內(nèi)螺紋閘閥1主要零件材料:閥體、閥瓣、閥桿、密封、填料密封:304,316填料:聚四氟乙烯閥桿:304,316閥體:WCB 閥瓣:304,316