他使橡胶塞牢固地塞进盖上的排气孔.He presses the rubber stopper firmly down on the vent.当掀下按钮时,排气孔通道被阻断,输出信号增大.When the button is depressed the vent is closed and the output signal increases.锁定排气孔.The exhaust port is marked and locked in...

“排气孔”的英语可以翻译为：[化] air-bleed hole ...