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The APU gearbox _____(起…的作用) an oil reservoir. which of the fol

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A gear–type oil pump in the gearbox provides pressure oil throug

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Two check valves prevent backflow and draindown.the above senten

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The compressor bearing scavenge pump and generator scavenge pump

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The ignition unit is a high energy high voltage (18kv) exciter.

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The_________(点火导线) is a heavily shielded copper wire conductor t

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"A heat exchanger for cooling engine oil by fuel flow or airflow

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"an electrical device for producing a spark in the combustion ch

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PS(静压环) is short for passenger service unit.

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Which one of the following is not a kind of metal?

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