To solve several typical equations of electrical line of force by using line-of-force equation, one can draw the diagram of electrical line of force.
利用力线方程，对几种典型的电力线方程进行求解，得出电力线图。
To solve several typical equations of electrical line of force by using line-of-force equation, one can draw the diagram of electrical line of force.
利用力线方程，对几种典型的电力线方程进行求解，得出电力线图。
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