介绍了液体火箭姿控发动机阀门电流信号采集系统的设计要点、研制方法与主要开发过程。
This paper presents the critical design, researching method and procedure of acquisition system for valve current signal of liquid attitude control rocket engine.
航天飞机发动机内的这三个阀门不断被更换，以确保它们是最有效的，能保障飞行的安全。
The three valves in the shuttle's engine compartment kept being replaced to ensure they were the best available and safe to fly.
这是原因之一，汽车制造商提供一个阀门，把空气离开汽车发动机冷却系统。
This is one reason why car manufacturers provide a valve to throw the air away from the car engine cooling system.
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