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 press-in coating真空浸涂vacuum distillation range减压馏程vacuum inductance furnace真空感应炉vacuum-type tensiometer真空式张力计vacuum degree equilibrium真空度平衡vacuum with oil quenching真空油淬vacuum and heating drying真空加热干燥vacuum filter-thickener真空过滤增稠机Vacuum electronic welding真空电子束焊接vacuum controlled advance真空提前