它不仅影响机构的压力角，而且还影响其轮廓曲线的曲率半径。
It influences not only the pressure Angle of mechanism, but also the curvature of earn contoUrs.
双曲表面，即通常所称的负曲率，因为它的表面曲线同时有的向上和有的向下，像一个马鞍，也许这样就可以代表宇宙的形状。
The hyperbolic surface, which has so-called negative curvature because its surface curves up and down at the same time, like a saddle, just might represent the shape of the universe.
提到这里的曲率图。正如一种方式，以确保曲线并不过于复杂。
Mention Curvature Graph here. Just as a way to make sure curves are not too complicated.
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