Auxiliary power unit
From Wikimedia Commons, the free media repository
English: An auxiliary power unit (APU) is a device on a vehicle whose purpose is to provide energy for functions other than propulsion. Different types of APU are found on aircraft, as well as some large ground vehicles.
Русский: Вспомогательная силовая установка
[edit] Auxiliary Power Unit
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Aircraft engine Garrett GTCP APU Hansa Jet.jpg
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