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 modulator pressure真空控制液压vacuum hydro-extraction真空萃取vacuum flash vaporization真空闪蒸vacuum-chamber aperture真空室孔径vacuum lightning arrester真空避雷器vacuum filtration process真空过滤过程vacuum ionization chamber真空电离室vacuum float zone crystal真空悬浮区熔晶体vacuum integrated circuit真空集成电路vacuum method of drainage真空排水法