air-operated diaphragm valve
... air-operated detector 气动式探测器 air-operated diaphragm valve 气动膜片阀 air-operated drill 气动钻机 ...
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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.
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