二次风大风箱风压
air pressure of big secondary air box
背风回流降水
lee reversal precipitation
变速箱回油
transmission scavenge oil
变速箱回油泵
transmission scavenge pump
变速箱回油泵部分
transmission scavenge pump section
变速箱回油部分
transmission scavenge section
变速箱回油管路滤网盖
transmission scavenge line screen cover
常温一次回风系统
conventional primary return air systems
二次回风空调系统
the secondary return air system
固定二次回风比
fixed ratio of secondary return air