vacuum arc真空电弧
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 solidification真空固化
vacuum preconcentrator真空预浓缩器
vacuum pressing method真空预压法
vacuum-tight housing真空罩
vacuum tube multimeter电子管万用表
vacuum forming machine真空成型机
vacuum contact machine真空接触器
vacuum-tube detector真空管检波器
vacuum deposited layer真空沉积层
vacuum well dewatering真空井点降水