| 摘要 |
<p>The panel (1) is advantageously of prefabricated type and consists of a flat surface (2) provided with a plurality of horizontal slots (4) of any arrangement on said surface, and comprises hinge means (5, 6) arranged to connect a plurality of said panels together in succession in a substantially vertical arrangement. The hinge means are advantageously self-fitting and self-locking to allow rapid side-by-side connection of several panels without hindering their adaptation to any radius of curvature of the watercourse.</p> |
