| 摘要 |
<p>The element (26) has a central ridge crossbar area (28), two longitudinal sided ventilation areas (30) adjacent to the ridge crossbar area, and ridge tile projection edge areas (32) longitudinally-sided adjacent to the ventilation area. The two projection edge areas have a metal sheet that produces vegetation-killing metal ions by a reaction with precipitation, where the sheet is formed with naps and/or with narrowed, z-shaped profiled foldings. The naps are parallely provided in a grid, where an adhesive (46) is provided at a lower side of the projection edge areas.</p> |
