The special meshing of convex and concave teeth profile makes the relative radius of curvature of the contacting point longer.

独特的凸凹啮合齿廓，使两齿轮在接触点处的综合曲率半径较大。

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Here concave type of geometry is the one in which the local center of curvature of workpiece and tool center lie on the same side.

这里凹面型的几何一个在当地的中心曲率的工件和刀具中心所在站在同一边。

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An important design element, which has an impact on the alley, is the slight curvature of the light-coloured rendered facade, which projects in a concave curve and thereby visually widens the street.

另一个对胡同产生影响的重要设计因素是微曲的产生光线和色彩渲染效果的外立面，在视觉上加宽了街道的微小曲率。

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