| 摘要 |
In a device having dual wheels (6, 8) for rolling along the ground and subject to clogging of material such as mud and the like therebetween, a dual wheel cleaner (10) is provided by a third wheel or annular member (12) suspended between the dual wheels and radially movable relative thereto such that material creeping up between the dual wheels at the bottom pushes the central suspended wheel upwardly such that as the dual wheels rotate, material is discharged by the suspended wheel radially outwardly from between the top periphery of the dual wheels.
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