Air compressor suction certain volume and pressure of the air, and the compression for smaller pressure higher after air output.
空压机吸入一定体积和压力的空气，并将其压缩为体积更小压力更高的空气后输出。
Also use between tooth seal volume change to achieve suction hydraulic oil.
也是利用齿间密封容积的变化来实现吸油压油的。
The volume control tank collects the purified, filtered letdown fluid and provides a suction reservoir and head for the charging pumps.
容控箱收集净化、过滤后的下泄流，同时它给上充泵提供净正吸入压头。
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