控制阀在污水缸变满时启动泵，并把污水抽进压力总管道。
The controller turns on the pump when the sewage tank is full and pumps the sewage into a force main.
管持续引流胆汁可降低胆总管压力。
压力调节和关断活门，气源系统中用以调节从发动机到气源总管的引气压力的活门。
Pressure regulating AND SHUTOFF valve PRSOV, a valve in the pneumatic system for regulating bleed air pressure from the engine to the pneumatic manifold.
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