vacuum gap真空间隙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-bag molding真空袋模制法vacuum extract still真空蒸馏提取器vacuum gage pressure真空计压力vacuum-tube ageing真空管时效vacuum freeze drying真空冷冻干燥vacuum out-gassing真空脱气vacuum level variety真空度变化vacuum encapsulating真空包膜vacuum demoisturizer真空脱湿塔Vacuum Pickup System真空捡拾系统

1. No vacuum or picture tubes were broken.
   真空管或显影管都未破碎。
2. Not any air gets into the vacuum tube.
   没有空气能进入真空管。