PZ673X气动对夹式刀型闸阀,手动对夹式刀形闸阀
不锈钢外螺纹针型阀J21W,..
(304.316.316L)..
(881,882,883,9..
铸钢无磨损轨道锥塞阀GZS4..
PZ673X气动对夹式刀型闸..