| 摘要 |
<p>The farm pulveriser comprises a ramp and two support arms which fold back on themselves so that they lie along the side of the tractor which carries the machine, but avoiding the door and driver. The arms are folded about a central support which moves vertically along the length of a fixed frame. Each folding arm comprises a double swivel pin which is linked to the lower arm section and which moves it angularly towards the rear of the moving trolley. the pivots may be secured in the folded position. The second swivel pin slides in an arc which is formed by rearward movement of the arm.</p> |
