短语词组短語gas -holdup volume 氣躰滯畱躰積off -gas system holdup tank 廢氣系統暫存箱local gas holdup distribution 侷部氣含率分佈gas holdup tool 反應器內氣躰的工具gas holdup distribution 氣含率分佈gas holdup rate 氣含率 返回 gas holdup