... automatic stop 自动停机装置，自动停机，自动停车 automatic stop and check valve 自动截止和逆止阀，主汽门 automatic stop arrangement 自动停机装置 ...
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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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