vacuum cap真空罩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-operated clipper真空驱动式毛剪vacuum pressure indicator真空压力指示器vacuum-tube transmitter真空管发送器,电子管发送器vacuum-type drum filter真空转鼓过滤机vacuum aided distillation真空蒸馏vacuum imaging technology真空成像技术vacuum draining off water真空排水vacuum prepressing method真空预压法vacuum batch distillation间歇真空精馏vacuum ultraviolet photon真空紫外光子