| 摘要 |
<p>The valley (1) has two suspension edges (3) suspended at a frame of two opposed slopes of roofs, where the valley is in shape of an elongated trough (2). Each edge is provided with a horizontal wing (30) oriented toward exterior, and another horizontal wing (31) oriented toward interior by overflowing in inner volume of the trough so as to form an obstacle to increase of water toward the roof. The latter wing covers the former wing to form double thickness of material. Each edge is formed by folding. The latter wing is fixed on the former wing.</p> |
