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“Radar” means Radio Detection and _______ .

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Flight information centers shall provide flight information serv

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Inertial navigation systems are _______ devices.

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The term knots when referring to speed means _______ per hour.

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A compass needle points to the _______ .

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The height of the mercury column will decrease by nearly one inc

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_______ is a kind of source of power which can provide power to

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For the aviation aircraft, the fuel tanks are usually mounted in

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_______ is a kind of unlawful interference.

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The ground speed of an aircraft is affected by a _______ which w

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