| 摘要 |
<p>The toolholder (6) serving as a support for the spade (7) is mounted slidably on at least one longitudinal slideway (18) fastened indirectly to the tractor (1) and is equipped with means (24) for anchoring in the ground, by means of which the slideway (18) can be displaced relative to the toolholder (6) immobilised by these anchoring means (24) during the tearing-out phase, two jacks being provided, one (25) for controlling the anchoring means (24) and the other (23) for displacing the toolholder (6) forwards on the slideway (18). <IMAGE></p> |
