circulation of closed system
closed system
系统组织
次序
闭式系统
用水密闭
排列
密闭系统
封闭系统
封闭体系
闭系统
密闭系
闭合系统
闭环系统
闭合系
闭口系统
封闭性系统
封闭系
closed system of functions
closed system with grouting curtain and drainage-p
closed-system separator
crankcase closed system
hydraulic system: closed center
monophase closed system
pilot-aircraft closed system
self-sealing closed system
symmetric closed system
self-closed system of inlet pipe
4-dimentional screening system