| 摘要 |
A self-adjusting support or structure including a cylindrical column having a top portion attachable to the structure and having a bearing plate partly closing the bottom with the column nesting within a casing that stands on the ground, the column being adapted to receive sand in its hollow interior, the column having spacing projections around its lower portion and the casing having spacing projections around its upper portions so that sand can flow into the casing beneath the bearing plate when the casing settles to a lower elevation.
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