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 resistance welding真空电阻焊
vacuum surface processing真空表面处理
vacuum discharge spectrum真空放电光谱
vacuum resistance furnace真空电阻炉
vacuum conductor rs valve真空紧急制动阀, 真空车长阀
vacuum-aided mud-jack真空辅助压浆
vacuum-sealing drainage封闭负压引流