Double Opening Exhaust Valves 双口排气阀
Double Disc Flat Gate Valves 双闸板平板闸阀
Double Disk Parallel Gate Valves 明杆平行式双闸板闸板 ; 明杆平行式双阀板阀板 ; 明杆平行式双闸板闸阀
double valves replacement 双瓣膜置换
Double-seal valves 双向密封阀
When disconnecting cylinders with diaphragm valves, it is most important to double close the valve and to properly install the outlet seal.
当切断钢瓶和隔膜阀的连接时，两次关闭阀门和正确安装排气口密封是最重要的。
AW series of large diameter valves using pneumatic actuator fork-type transmission, reasonable structure, output torque, a double-acting and single acting.
大口径阀门采用系列aw型气动执行器拔叉式传动，结构合理，输出扭矩大，有双作用式和单作用式。
The imbalance in architectural inner system can be solved to set the double-pipe system with temperature-controlled valves.
建筑物内部系统竖向失调则可通过设置带散热器温控阀的双管系统来解决。
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