When the gas cylinder when the exhaust pressure to achieve, when the exhaust valve 4 is opened, the gas was discharged to complete a working cycle.是什么意思_When the gas cylinder when the exhaust pressure to achieve, when the exhaust valve 4 is opened, the gas was discharged to complete a working cycle.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句