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A numerical calculation technique is presented in this paper in order to calculate the lines of electric force and equi-potential contours in axisymmetric three-dimensional fields by means of inversible visual method. The inversible visual method is based on "the inversibility of potential flow fields", in which the lines of electric force and equi-potential contours can be exchanged each other. In this paper, an application of this technique to electric fields is illustrated by calculating lines of electric force and equi-potential contours around a suspension-type insulator. It is concluded that the presented technique is effective to calculate the lines of electric force in the fields such as composite dielectric substances with complex boundary surface of different dielectric constants.

Numerical Calculation of Electric Fields in Axisymmetric Three-Dimensional fields by Means of Inversible Visual Method