| 摘要 |
The unit has a central column (10) with a polygonal base (11) having sides for radial fixing of planet gears. Each planet gear includes two branches forming a ground support, where each branch includes a raised end (25) forming a receiving piece (26) for partially receiving a wheel axle of a motorcycle. The planet gears are divided into a main planet gear (20) fixed to the base, and a secondary planet gear (30) is fastened to the main planet gear by connecting corresponding joining sections (23, 33) of the planet gears.
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