| 摘要 |
A self-propelled irrigation device comprises a wheeled chassis (12) having a drive wheel (14.2), a rotary take-up reel (18) mounted on the chassis, a drive arrangement, and differential and change-speed gearing (26) for apportioning drive from the drive arrangement differentially between the take-up reel for taking up the hose and the drive wheel for propelling the irrigation device in the direction in which the hose extends away from the device, different drive transmission ratios being selectable.
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