| 摘要 |
A harrow comprises a body (1), supporting members, eg rollers (2, 3) or drags resting on the surface of the soil, and planing blades (4) positioned below the level of the bottom of the rollers. In known harrows the working depth varies and the tilling effect is incomplete. These disadvantages can be avoided if the planing blades (4) are positioned between the rollers (2, 3) and are secured to transverse stocks (5) which are fastened to the body (1) by means of spring elements (6). <IMAGE> |
