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vacuumbakingn.真空烘焙法vacuum range真空范围vacuumdegree真空度Vacuum clamp真空夹具vacuum ratio真空度vacuumbottlen.热水瓶vacuum space真空室,真空间vacuum metern.真空计vacuum valven.真空管vacuum truck真空油槽车