Rotate and tilt the vacuum actuator as required to disengage the hole on the end of the actuator link from the hooked pin on the end of the recirculation air door lever.

视需要旋转并将真空引动器倾斜以放松循环空气门连杆末端上的勾销放松引动器连接末端上的孔。

youdao

Air also flows into the lavatories from the cabin air distribution and recirculation system through individual air outlets.

空气也可以从客舱空气分配和再循环系统，通过单独的出口，流向厕所。

youdao

Is your system operating with 100% fresh air, or is the system operating in recirculation?

您的系统运行时是采用100%新风方式，还是回风参与再循环的方式？

youdao

One is exhaust gas recirculation, which pumps cooled exhaust back into the engine air intake, lowering the combustion temperature and reducing NOx formation.

FORBES: Clearing the Air