| 摘要 |
<p>Tile of the channel plus cover type, which comes with a horizontal short overlap (1), a narrow channel with a flat outer segment (2) and a grooved inner segment (3), a raised cover (4), with crown of the order of half the chord, its side being recessed (5), for butt and guidance of adjacent tiles, and also, a diversity of transversal ribs for strengthening of the cover zone and for support of the flashing zone, the lower extremity being skewed and the uppermost one acting as chock (6) and the lowest as gutter (7). <IMAGE></p> |
