针型阀批发 选购指南
J21W-320P高压针型阀-J13W高压内螺纹针型阀批发零售
外螺纹截止阀主要零件材料Materials for main parts 零件名称Part name 阀杆、阀盖Stem,Bonnet 阀杆、阀瓣Stem,Disc 填料Packing J23W-16P 铬镍不锈钢 Cr.Ni Stainless steel 铬镍不锈钢 Cr.Ni Stainless steel ......
外螺纹截止阀主要零件材料Materials for main parts 零件名称Part name 阀杆、阀盖Stem,Bonnet 阀杆、阀瓣Stem,Disc 填料Packing J23W-16P 铬镍不锈钢 Cr.Ni Stainless steel 铬镍不锈钢 Cr.Ni Stainless steel ......