Profile of a surface locates the surfaces in addition to controlling the angularity.
面轮廓度不仅能控制斜面的位置，而且能控制面的倾斜度。
Curvatures of theoretical profile surface, which is a ruled surface, are easy to get.
由于理论廓面是直纹面，其廓面曲率容易求得。
Curvatures of theoretical profile surface, which is a ruled surface, are easy to get.
由于理论廓面是直纹面，其廓面曲率容易求得。
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