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landing gear

noun
🔊/ˈlændɪŋ ɡɪə(r)/
🔊/ˈlændɪŋ ɡɪr/
(also undercarriage)
[uncountable]
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  1. the part of an aircraft, including the wheels, that supports it when it is landing and taking off（飞行器的）起落装置Topics Transport by airc2