vacuumpumpn.真空泵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 nitriding technology真空渗氮技术vacuum extraction equipment抽真空设备vacuum circulation refining真空循环精炼vacuum pre-humidification真空预湿机vacuum-jacketed container真空瓶vacuum pre-loading method真空预压法vacuum hot stage microscope真空温台显微镜vacuum fluorescence display真空荧光显示器（VFD）vacuum-controlled advance负压控制提前vacuum obturation technique真空充填法