| 摘要 |
<p>An agricultural implement and particularly a mole drainer has a mounting frame (12) connected to a tractor three point linkage and a beam arrangement (2) pivotally connected to the mounting frame about a transverse pivot axis (14). The beam arrangement slides over the ground in use and holds the mole boring device (34) at a well regulated depth. A normally slack chain (40) or other linkage extends from the top of the mounting frame to the rear of the beam arrangement. On lifting by the tractor linkage, the beam arrangement is first tilted causing the mole boring device to rise to the surface then as the chain is brought into tension the beam arrangement is lifted bodily from the ground.</p> |
