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Modern airplanes are fully equipped with advanced technology. Many people do not know the meaning and purpose of these airplane things. Today, we notify you about some of the things that you did not know yet.
Have you ever heard a strange sound when you board an airplane? It comes from the auxiliary power unit.
Modern airplanes are fully equipped with advanced technology. Many people do not know the meaning and purpose of these airplane things. Today, we notify you about some of the things that you did not know yet.
Have you ever heard a strange sound when you board an airplane? It comes from the auxiliary power unit.
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