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[单选] 起落架手柄锁有什么作用? What" s the function of landing gear LEVER LOCK?
A.提供液压,使每个主起落架倾斜 to provide hydraulic pressure to tilt each main gear B.在地面防止把起落架手柄提到UP位,或在飞行中当任意一个主起落架未倾斜或任意一个起落架不在中间位时收上起落架 to prevent placing the gear lever to the UP position when on the ground or with unsafe conditions in flight C.当主起落架没有倾斜时,防止把起落架收柄放到DN位 To prevent placing the gear lever to the DN position when the main gear is not tilted
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