| 摘要 |
A door assembly which includes a door frame defining an opening and a door. The door includes a first rectangular panel which is rotatably mounted to the door frame and moveable between an open and a closed position. A second panel is connected to and rotatable with the first panel and is disposed generally parallel to, or co-planar with the first panel and moveable thereto in plane of the panels so as to be moveable between a retracted position where the second panel is generally laterally adjacent to the first panel, to an extended position where the second panel is spaced from the first panel in the direction of the plane of the panels. The door assembly is operative to cover the opening defined by the door frame by movement of the first panel from its open to its closed position and movement of the second panel from its retracted to its extended position.
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