vacuumtuben.电子管
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 pasteurization真空巴氏杀菌
vacuum system testing真空系统试验
vacuum firing furnace真空炉
vacuum tube impedance电子管内阻抗
vacuum heating boiler真空加热炉
vacuum melting method真空熔炼法
vacuum-test machine真空试验仪
vacuum pressure gauge真空压力表
vacuum drying machine真空干噪机
vacuum hot extraction真空加热提炼