Its gravitational field is on a density suddenchange belt of Bouguer anomaly isopleth.
重力场则处于布伽重力异常等值线疏密突变带上.
In engineering, it is generally required to draw a group of isopleth by the known function values of scattered points.
目前,工程中大量存在已知离散点上函数的数值要求绘制其等值曲线的问题。
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