这种链条的铰链由滚动副组成，具有减磨、耐磨性能。

The joint of this chain is composed of a rolling pair, so that the friction is lower.

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本文引入平面瞬心副（纯滚动副），提出了平面机构结构公式的新含义。

This paper gives a new explanination to the structural formula of plane mechanisms with the help of introducing the rolling pair.

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介绍了直线滚动导轨副的结构、工作原理、选用方法及其常用的安装方式。

This paper introduces the structure, working principle, selecting method and common erecting mode of the straight-line rolling guide set.

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