Secondly, analysed the approach model, described circular arc approximation method, approaching blade curved surface with this method and realized raise of the approach speed.
其次，分析了逼近模型，推导了单圆弧逼近方法，用这一方法来逼近叶片曲面，提高了逼近速度。
The generation of a Bézier curved surface with the fixed area is approached as an approximation problem.
讨论了带有面积约束的光顺曲面造型方法。
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