| 摘要 |
The door comprises panel sections (11) hinged together on horizontal axes, with rollers or pins working in lateral guide rails between the vertical shut and horizontal open positions. Each panel has at the top or bottom a protruding tooth (7), with sides (10,11) sloping from its tip (9), symmetrical w.r.t. the panel centre line. The adjacent panel (1') contains a mating recess (13). As the panels are hinged on travelling round the curve in the guide rail they leave a gap (d) between them too narrow for a finger to be trapped in it.
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