| 摘要 |
A planetary gearing consists of a body, a drive shaft and a driven one, first sun wheel fixed on the driven shaft and a carrier connected to the drive shaft with first axle installed on it, with two satellites fixed on it, the first of those is in coupling with the first sun wheel. On the carrier another axle is installed with roller fixed on it, second sun wheel installed to inside of the cylindrical cavity, this is in coupling with the second satellite and is connected to the body with expansion clutch.
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