| 摘要 |
Arrangement for levelling of sandpits 1 for various straddle jump landing sites comprises rails 2 for both sides of the sandpit and between these a reciprocating slide 3, which further comprises at least one scraper element 4 for breaking up the sand, sand shifting elements 5.1, 5.2 for filling in hollows and a levelling element 6 for levelling out the broken-up layer of sand and devices for shifting these vertically. The sand shifting element comprises a plurality of parallel V-shaped ploughs 5.1 aligned in the opposite direction to the levelling direction and a transverse bar 5.2 or the like with its support element running behind the scraper element 4. <IMAGE>
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