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。

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

youdao

燃油阀是目前发达国家较为普遍应用的高性能“汽油开关”，国内称为真空膜片阀、真空膜片式“汽油开关”。

Fuel valve, a high-performance "gasoline switch", is widely used in developed countries. It is called vacuum diaphragm valve or vacuum diaphragm type "gasoline switch "in China.

youdao

燃油阀是目前发达国家较为普遍应用的高性能“汽油开关”，国内称为真空膜片阀、真空膜片式“汽油开关”。

Fuel valve, a high-performance "gasoline switch", is widely used in developed countries. It is called vacuum diaphragm valve or vacuum diaphragm type "gasoline switch "in China.

youdao