| 摘要 |
This apparatus consists of a hydraulic motor actuated by the vehicle's engine pump, which transmits its rotary movement by means of a shaft to a differential, from which differential branch off two axles carrying a rolling element which is applied under pressure against the respective rear wheel of the vehicle, or transmits its movement to the wheels by means of a belt or chain meshing with a pulley or crown (wheel), respectively, fixed to the wheel. It applies preferably to agriculture, in order to achieve slow movement of the tractor without the need for a driver. <IMAGE>
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