The two elements of a lower pair have theoretical surface contact with one another, while the two elements of a higher pair have theoretical point or line contact (if we disregard deflections).
这两个因素中的低副是两个理论表面之间的接触，而这两个因素中的高副是理论的点或线接触(如果我们忽视了挠度)。
These impacts and loads are concentrated at a single point or line of contact between follower and cams, as mentioned before.
这些影响和负载都集中在一个点或线的接触追随者和摄像机，如前所述。
Because of the line contact or even point contact between zigzag slot and pin, its friction is different and needs to be studied.
由于惯性筒上的曲折槽与销间的为线接触甚至点接触，因此针对此处较为特殊的摩擦系数进行研究。
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