In this paper, the formulae for calculation of circumferential clearance between rollers and analysis of roller radial self locking condition are derived.

文中推导出滚子圆周间隙和滚子径向自锁条件的计算公式。

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Locking poachers up is not quite so useful, Hilborn says, and in a way this is lucky considering the condition of the jail they're usually locked up in.

NPR: Conservationists Split on How to Curb Poaching