| 摘要 |
<p>The invention has been designed to be applied to conventional agricultrual tillage equipment. The invention provides a new and improved method of lifting and lowering, controlling and maintaining an accurate level of the said equipement. It consists of a single hydraulic cylinder powering a scissor-type mechanical principle designed in such a configuration that the power provided by the hydraulic cylinder is transferred to each pivoting axle. The advantage of the device in in that it is a relatively light weight arrangement while retaining stability and rigidity of the arrangement in operation.</p> |
