vacuum pot真空锅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 method wellpoint真空预压法井点vacuum evaporated layer真空蒸发层vacuum-tube converter电子管变频器vacuum pre-compacting真空预压vacuum refining furnace真空精炼炉vacuum ultraviolet rays真空紫外射线Vacuum transport system垃圾气力管道输送系统vacuum automatic seamer自动真空封口机vacuum-cleaner dredge真空吸泥机vacuum drying of cocoon蚕茧真空干燥