| 摘要 |
A low-profile screen which allows water to pass through apertures formed therein to allow water to drain through the screen. A plurality of ridges are formed on the surface of the screen to allow water to drain at a number of different elevations, to increase the structural rigidity of the screen, to improve snow-melting, and to improve the screens reliance when compressive forces are exerted on the screen. Under compression the screen snaps into place. The ridges further promote debris being blown off of the surface of the screen.
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