I work in an auxiliary unit.

我在一家附属单位工作。

youdao

Such machine can also be equipped with the lantern auxiliary unit manufactured by our factory to twist lantern (birdcage), it is simple in installation, saving labor, and easy to operate;

也可配置我厂生产的灯笼附机扭灯笼（鸟笼），该辅机安装简单，省工、省力操作方便；

youdao

Honeywell Providing fly-by-wire flight control system, inertial reference and air data systems, auxiliary power unit, wheels and brakes.

霍尼韦尔提供电传飞控系统，惯性参考和空中数据系统，辅助动力装置，机轮刹车。

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The battery powers the auxiliary unit and provides electricity for ground operations.

CNN: STORY HIGHLIGHTS

United Technologies, which builds the aircraft's auxiliary power unit, said it would also cooperate.

BBC: Dreamliner: Japan and US probe battery maker

Flight 186's auxiliary power unit failed during the wait and the aircraft had to return to a gate.

WSJ: Flight Nightmares Overshadow Airlines�� Improving Record