Most airlines have a minimum age for unaccompanied children,typically five,and a maximum age,typically twelve.

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用于上下客梯的轮椅的简语是( )

用于通过停机坪的轮椅的简语是( )

用于到达或离开客舱座位的轮椅的简语是( )

担架旅客的简语是( )

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