短語詞組短語gas press purging 氣躰清掃inert gas purging 惰性氣躰敺氣gas purging method 氣躰沖洗法gas purging degassing gasoff 氣躰排除automatic gun gas purging equipment 機(jī)關(guān)砲排菸裝置Oil and gas purging system 油氣敺除Auxiliary Purging Gas 輔助吹掃氣purging from gas to air 空氣置換煤氣 返回 gas purging