| 摘要 |
<p>An agricultural tractor comprises a differential case containing a differential mechanism, a transmission case containing a first speed change mechanism, a speed change case not integral with the differential case or the transmission case and interposed between and directly coupled to the differential case and the transmission case. A second speed change mechanism is contained in the speed change case and is adapted to provide a greater reduction ratio than the maximum reduction ratio provided by the speed change mechanism.</p> |
