| 摘要 |
The device has rectangular segments (10, 11, 20) slidingly mounted with an interposition of skids (5, 6). Each segment has inclined pans which are used for supporting the skids to reduce spacing between the segments. The inclined pans are arranged on different heights of the segments by forming an angle between 3-18 degrees with the heights. The inclined pans are assembled in cages (16a, 16b, 26a, 26b) which are equipped with wings (17a, 17b) and continuous cords (27a, 27b) integrating the cages with the segments. |
