二次曲线拟合
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second curve fitting
以上为机器翻译结果，长、整句建议使用 人工翻译 。
In the second part, the deformation curvature, which is determined by second derivative of curve fitting of the deformation of the retaining structure, is proposed.
提出由曲线拟合围护墙变形，两次求导后得到变形曲率。
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