Spring opposed , air operated diaphragm or piston, actuators are preferred for on-off applications.

弹簧平衡型、气动膜片或活塞，执行机构对于开关阀是首选的。

youdao

Spring opposed , air operated diaphragm or piston, actuators are preferred for on-off applications.

弹簧平衡型、气动膜片或活塞，执行机构对于开关阀是首选的。

youdao