| 摘要 |
A spherical disk contains a ring-like working part, axial and radial elements, a space for spilling a layer of the soil being cultivated and a blade, placed at a section of the geometrical surface of rotation of the first or second order. On the axial element of the spherical disk at the same distance from the centre of the disk openings for connecting thereof with the axle of a beam are made, the amount of which and the radius of a circle, whereon openings are arranged, depend on the strength of the material, of which the spherical disk is made, and technological properties of the soil being cultivated.
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