crankcase closed system
closed system
封闭系统
闭合系统
闭系统
密闭系统
封闭系
封闭性系统
闭式系统
密闭系
封闭体系
闭环系统
系统组织
闭合系
闭口系统
用水密闭
排列
次序
closed degassing system
closed orthogonal system
closed crankcase ventilating system
Closed transplant production system
Closed hydraulic system
closed recirulating system