The pressure of scraper is controlled by the air pressure adjusting valve.
配套气压调节阀，控制刮印刀的压力。
The valve should be completely closed or open; it should not be used as adjusting valve.
气阀在使用过程中应全开或全关，禁止作调节阀用。
The gas box through the adjusting valve and purifier is connected with the infusion bottle.
气箱通过调节阀、净化器和输液瓶相通。
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