文中推导了拉维娜式行星齿轮变速器的单排双行星轮式齿轮机构的运动特性方程式。
This paper derives the motion property equation of the one-row and two-planets gears for Ravigneaux planetary transmission.
电动滚筒式驱动器类似于一个行星齿轮带有拓扑结构，而这个行星齿轮和齿圈都用辊作为它们的齿。
A roller drive has a topological structure similar to an epicyclic gearing, where both the planet gear and the ring gear have rollers as their teeth.
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