短語詞組短語gas press purging 氣體清掃inert gas purging 惰性氣體驅(qū)氣gas purging method 氣體沖洗法gas purging degassing gasoff 氣體排除automatic gun gas purging equipment 機關(guān)炮排煙裝置Oil and gas purging system 油氣驅(qū)除Auxiliary Purging Gas 輔助吹掃氣purging from gas to air 空氣置換煤氣 返回 gas purging