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。
An opposed-piston engine has cylinders in each of which two pistons travel in opposite directions.
对置式的发动机的每隔气缸中都有两个活塞沿相反方向运动。
The Series 39 Pneumatic Actuator design is based on the opposed rack-and-pinion principle utilizing piston guide rods to guarantee part alignment.
系列气动执行器设计基于对立的机架和小齿轮原理，利用活塞导杆来保证部件对齐。
The Series 39 Pneumatic Actuator design is based on the opposed rack-and-pinion principle utilizing piston guide rods to guarantee part alignment.
系列气动执行器设计基于对立的机架和小齿轮原理，利用活塞导杆来保证部件对齐。
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