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对矿山机械中常见的工程多元曲线图进行计算机处理时所遇到的一些实际问题做了详细地分析探讨。结合具体实例，提出了通过平面图形变换和选择合适拟合自变量将不能直接进行曲面拟合的不规则自变量区域转化为规则的矩形拟合区域的方法。
Some practical problems encountered in the computer processing of common multivariate plots of mine machinery are analyzed and discussed in detail. Combined with practical examples, a method is proposed to transform the region of irregular variables that can not be fitted directly into a regular rectangular fitting region by using planar graphics transformation and selecting suitable fitting independent variables.