辅助动力装置是飞机内的小涡轮发动机，在地面或空中给各系统提供电源和气源。
A small turbine engine in the airplane for supplying electrical and pneumatic power for systems operation on the ground or in flight.
辅助动力装置是飞机内的小涡轮发动机，在地面或空中给各系统提供电源和气源。
A small turbine engine in the airplane for supplying electrical and pneumatic power for systems operation on the ground or in flight.
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