因此，有必要建立导曲线的方程序。

Thus, it is necessary to establish the equation of guiding curves.

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在设计水平直元线犁体曲面时，确定其导曲线的形状和参数是重要的一环。

In the design of plow bottom surface formed by horizontal straight-line elements, it is important to determine the shape and parameters of guiding curve.

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本文简述了标定的原理、田间土壤水分特征曲线和非饱和导水率的标定方法，还给出了水分运动参数标定的实例。

In this paper, the concept and the method of scaling are described, and some examples of scaling of soil water characteristic curve and unsaturated hydraulic conductivity are given.

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