| 摘要 |
An agricultural implement has a working position extending laterally behind a towing tractor and a transport position in which it is towed endwise behind the tractor. The implement has ground wheels that support the implement in both working and transport positions. These are rotatably mounted on the implement frame and are coupled to the hitch pole and the instrument by a steering linkage so that as the hitch pole moves between its working and transport positions, the wheels are steered between their respective working and transport positions.
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