磨光值，是反映石料抵抗轮胎磨光作用能力的指标，集料磨光值是决定某种集料能否用于沥青路面抗滑磨耗层的关键性指标。
其中利用了样条磨光方法对地形高差离散值进行拟合磨光求得曲面近似函数，用之参与计算。
The spline polishing method is used for dispersion value of typography elevation difference to conduct fit polishing so as to get the near function which is used in calculation.
从而把插值公式与磨光公式统一起来。
Therefore, it is uniform for interpolating formula and smooth formula.
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