他们常用的交替施加压力和排气阀门执行器或单作用气缸的压力。
They're commonly used to alternately apply pressure to and exhaust pressure from a valve actuator or a single acting cylinder.
本发动机自动进气、自动排气，而省去了进、排气阀门及传动系统。
It automatically admits and exhausts the gas, thus omitting gas inlet and outlet valves and driving system.
排气阀门的关闭直接造成参与气泡振荡的气体质量的减少，第二气泡脉冲相对主脉冲明显减小。
When the exhaust valve is closed, the gas with the bubble oscillation reduces, causing the bubble impulse lower the pressure impulse obviously.
有特别优异的分水性及氧化安定性，热稳定性、抗泡性，不产生积碳，保持排气阀门清洁，延长维修期。
A particularly excellent demulsibility and oxidation stability, thermal stability, anti-foam, no carbon deposit, maintain the exhaust valve cleaning, extended repair period.
该空压机在运行时活塞始终在旋转，且运行一周，自动完成进、排气两个压力循环，无须进、排气阀门等配气机构。
When it works, the piston rotates all the time, and runs a circle to automatically complete two pressure circulations of charging and exhausting without air distributing mechanism.
该空压机在运行时活塞始终在旋转，且运行一周，自动完成进、排气两个压力循环，无须进、排气阀门等配气机构。
When it works, the piston rotates all the time, and runs a circle to automatically complete two pressure circulations of charging and exhausting without air distributing mechanism.
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