| 摘要 |
A hanger door arrangement which comprises a door having two upper door panels adapted to be pivotally connected to the top of the hanger door opening in side-by-side relationship and two lower door panels pivotally connected to the lower edges of the upper panels, and an operating mechanism which raises the door to an open position in which the lower panels allow passage of the wings of an aircraft beneath them and the tailgate between them.
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