短語(yǔ)詞組短語(yǔ)turbine vacuum level 透平真空度chamber vacuum level 夾層真空度low vacuum level technique 低真空技術(shù)ultimate vacuum level 極限真空度control vacuum level 控制真空水平;控制真空度vacuum level offset 間産生了真空能堦偏移vacuum level variety 真空度變化 返回 vacuum level