A valve immediately shuts off the gas when the lid is closed.(当盖子合上时，立刻会有一个阀门切断煤气。)
He replaced a dud valve.(他换掉了一个无用的电子管。)
The pump sucks air out through the valve.(气泵通过阀门把空气抽出去。)
Residents heard an enormous bang as a safety valve on the boiler failed.(当锅炉的一个安全阀失灵时，居民们听到了一声巨响。)
There is, admittedly, a safety valve.(可以说，有一种安全阀还是存在的。)
Conrad dies but Troy survives with a punctured lung, requiring a flutter valve in his chest to relieve pressure.(康拉德死了，但特洛伊活了下来，他的肺被刺破，需要胸腔里的一个翼阀来释放压力。)
Before leaving, Mr. Seymour turned off the vacuum cleaner and the water valve.(在离开之前，西摩先生关掉了真空吸尘器和水阀。)
This will mean installing a three-way motorised valve, a cylinder thermostat and making some changes in the pipe layout.(这将意味着安装一个三通电动阀，一个气缸恒温器并对管道布局进行一些更改。)
Every finished valve shall be taken the electriferous blowing test.(每只成品阀都会进行通电喷吹检验。)
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