| 摘要 |
<p>The regulating and reversing drive has a hydraulic cylinder to regulate the width of the furrows. The cylinder has chambers on each side of the piston connected to a reservoir via a control valve. One chamber, defined between the rear face of the cylinder and a free piston, is communicable with a hydraulic cylinder which controls reverse movements of the plough. - The cylinders are connected via a direction control valve. The other end of the reversing cylinder is in hydraulic communication with the reservoir via the direction control valve.</p> |
