| 摘要 |
<p>The roofing for stairs is designed especially for externally situated cellar stairs placed below a window. The flat roof is held by beams. Part of the roof is moved for releasing the stairs entrance door from a covering position into the entrance position. The roof part has two sections, one of which is held firmly, the other end being able to move. The length of the moving section is about one third of the overall length of the roof.</p> |
