“放气”造句

火车进站后, 火车头开始放气.
After the train got to the station, the engine began to blow off.

杜瓦微漏孔和真空室内部材料放气使杜瓦真空度下降.
Leakage and outgas of dewar vacuum vessel also is analysed.

注意: 在进入拉削时一定要关闭放气开关.
Notice: When broaching, make sure that the air escape cock is closed.

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