| 摘要 |
<p>In the mower of the invention, during the rotation of the pivoting member (72) occurring at the time of the vertical displacement of the mowing unit (2) permitted by the deformable four-bar linkage (38, 39), said pivoting member (72) varies the lever arm of the return force exerted by the elastically deformable member (70) in relation to the axis (75) in such a direction that the lever arm increases when the return force decreases, that is to say when the mowing unit (2) is displaced upwards. <IMAGE></p> |
