水银真空泵
mercury vacuum pump
mercury pump
mercury vapor diffusion pump
mercury air pump
pump
mercury vacuum
真空盒的测试
The test of vacuum chamber
薄膜真空脱气机
film type vacuum deaerator
低真空空气测微仪
low vacuum air micrometer
复合凝结水真空除氧器
compound condensing water vacuum deaerator
复合凝结水真空式除氧系统
composite condensate vacuum deaerator system
基于仿真的装备管理
simulation based material management
集热管的真空开管装置
vacuum opener for all-glass evacuated collector tubes
节水真空厕所
water-thrifty vacuum toilet