| 摘要 |
An upwardly-opening door requiring limited space during opening and closing, the door being made of two panels with the second panel being hinged to the first panel and the first panel being hinged to side walls, the second panel also being guided in tracks mounted to the side walls, such that upon opening of the door the two panels form a canopy over the door opening. In a preferred embodiment, when the door is opened, the second panel is in a horizontal position.
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