| 摘要 |
<p>A concrete bucket structure has a lower rigid assembly including a ring for supporting the structure on the ground. A rigid hopper with an open top is mounted on the ring. Rods are releasably bolted at lower ends to the ring and at upper ends to a second rigid ring thereby supporting the second rigid ring well above the top of the hopper. A rubber cone has the edge of its large open upper end secured to the second rigid ring and its small open lower end hung unattached in the hopper. The upper, rigid ring may be dismantled from the lower rigid assembly by unbolting and removing the rods, to make a smaller package for shipping.</p> |
