| 摘要 |
<p>The edge of the sheet of roof fabric (4) is folded through 180 degrees over the edge of a support strip (3) and is trapped between this strip and a locking strip (5). The locking strip has a large number of square eyes (7) with square apertures (8) fitting over catches (10) on the support strip. The eyes protrude through apertures in the strip.</p> |
