介绍顶管掘进机截割传动装置所采用的行星齿轮减速器，论述行星齿轮减速器的结构特点。
This paper introduces the epicyclic reduction arrangement applied in cutting drive mechanism in pipe jacking, analyses the construction and characteristics of epicyclic reduction arrangement.
四环减速器是采用多齿对啮合、少齿差齿轮传动实现减速的新型减速装置。
The four-ring reducer is a kind of new typed retarding device with many mesh points, gearing with small difference between the numbers of teeth.
三环式齿轮减速器是在普通少齿差行星减速器基础上开发的一种新型传动装置，应用前景广泛。
Three-ring reducer is a new transmission device which develops in the foundation of few tooth difference planet reducer, its application prospect is wide.
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