使用极坐标法放样可以避免偏角法的局限性。

And lofting with polar coordinates method can break through localization of deflection Angle method.

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缓和曲线是一种常见的曲线形式。使用极坐标法放样可以避免偏角法的局限性。

The transition curve is a familiar curve form. And lofting with polar coordinates method can break through localization of deflection Angle method.

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本文用极坐标法放样，讨论了线路曲线中任一点坐标计算公式及其近似公式的误差大小。

Using polar coordinate system to set out, the coordinate computing formula and the error of its approximate formula are discussed of any point in line.

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