... one-direction pattern 单向式 one-direction valve 单向阀 one-direction pressing 单向压制 ...
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A check valve is a mechanical valve that only permits water flow in one direction.
检查阀(单向阀)是一个手动阀门，这样水只能往一个方向走。
The spring return pneumatic actuators use an air supply to drive the valve stem in one direction and an internally loaded spring to return to the valve to its original position.
春季返回气动执行机构使用的空气供应，以推动一个方向阀杆和一个内部装载弹簧返回到原来的位置阀门。
Check valve before the valve is to use the pressure after poor hoist the automatic valve, it is the role of the media flows only in one direction, reverse and stop its flow.
止回阀是利用阀前阀后的压力差而自动启闭的阀门，它的作用是使介质只做一个方向的流动，而阻止其逆向流动。
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