The reverse of lumen part is different from outline, such as collect data method, treat with point, pick up feature point and curve fitting.
曲面内腔类零件的反求有别于轮廓外形的反求，主要体现在数据采集的方法，点云的处理，特征点的提取以及曲线的拟合。
This algorithm is fast, can be used widely, and can pick up Minimum Closed Loop from any complicated curve set.
该算法速度较快、应用范围广，能适用于任意复杂曲线集提取最小闭环的情况。
This algorithm is fast, can be used widely, and can pick up Minimum Closed Loop from any complicated curve set.
该算法速度较快、应用范围广，能适用于任意复杂曲线集提取最小闭环的情况。
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