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-tube bridge电子管参数电桥vacuum tube capacity电子管电容vacuum chuck handler真空吸笔装卸装置vacuum tube detector电子管检波器vacuum end collector断头吸棉装置Vacuum braze welding真空钎焊vacuum switch device真空开关器件vacuum deodorization真空脱臭vacuumtube rectifier电子管整流器vacuum rotary filter真空回转过滤器