| 摘要 |
A lifting door includes a plurality of slats pivotally connected one to the other for pivotal movement about horizontal axes. Each slat carries at opposite ends a guide. Guide tracks are disposed in a door aperture for guiding the door during opening and closing. The guide tracks above the door aperture extend in a generally inwardly directed spiral configuration whereby, upon opening the door, the slats are guided about the spirally configured guide tracks into an open position without engaging one another.
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