vacuumtuben.电子管
vacuumn.真空;真空吸尘器;空白adj.产生(利用)真空的v.用吸尘器打扫
vacuum deehlorination真空脱氯
vacuum-mould method真空模具法
vacuum tube rectifier电子管整流,真空整流
vacuum cleaning plant真空吸尘装置
vacuum leak indicator真空示漏仪
vacuum type thickener真空圆网浓缩机
vacuum leak detection真空检漏
vacuum cleaning truck真空吸污车
vacuum tube converter电子管变频器
vacuum breaking valve真空破坏阀