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control zone [kɔn'trəul 'zəun]
avia., Canada	A controlled airspace of defined dimensions extending upwards from the surface of the earth up to and including 3000 ft AAE unless otherwise specified
USA	A controlled airspace extending upwards from the surface of the Earth to a specified upper limit (JP 3-52) see also control area

control: 27 phrases in 1 subject

Microsoft

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