| 摘要 |
<p>The cover for swimming-pools comprises a flexible sheet (1), one end of which is attached to a traction surface (4) and the other end of which connected to a winder (7). The sheet is guided by rods (2) which slide in slots (3,3') in the edges of the pool. The sheet is held under tension when fully deployed by cables inside the slots (3,3') which extend between the bar (4) and the winder. The traction surface is made up of a cord (5) and a rigid bar (4) across the end of the sheet.</p> |
