| 摘要 |
<p>Rain water troughs need to be protected with a suitable screen in buildings located on a site with trees near the building. Leaves, twigs, needles and other undesirable material are washed by rain from the roof into the water trough which is thus filled and blocked so that water cannot flow in the trough. The object of the invention is to produce a new type of roof covering or its extension that allows leaves and rubbish to be guided along the roof covering or its extension over the water trough to the ground while water flowing down the roof covering is guided into the water trough through holes provided in the roof covering or its extension.</p> |
