| 摘要 |
The guide for positioning a wheel (10) has a reduction transmission under the protective casing (19) associated with a guide tube (1). the assembly is controlled by a movable crank. The reduction system has a series of four pinions and a demountable guide tube and it is fixed on the left face of a hitch stirrup (18). The guide tube supports a Cardan joint on its lower face and carries, threaded on its axis, an interchangeable nut of the same dimensions as that of the cylinders of the trailer.
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