| 摘要 |
<p>The slope preparation device for seed broadcasting has a roller (14) with a series of pyramid-shaped projections (15). The support (9) can carry out limited pivoting about a shaft (2) which is parallel to the roller and a shaft (6) which is normal to this. The roller (14) is held in a middle position with respect to its vertical pivot shaft (6) by spring pairs (17, 18). The square base surface of the pyramid-shaped projection has a diagonal of about 50 mm. The height of the pyramids is about 35 mm. while the pyramid tips are rounded (16).</p> |
