给出了常见的线性电阻的种类，原理及具体特点和输入输出特性曲线。-is a common type of linear resistivity, principle and the specific features and characteristics of the input and output curves.

用于电法勘探中的平面等值线的绘制，抽取某一深度电阻率值-For electrical prospecting in the plane contour drawing, taking a deep resistivity