本文从互为对偶的电网络的线图矩阵间关系的分析，得出求作对偶电网络的矩阵法。它异于常用的几何作图法。
After analyzing the relations between graph matrices of dual electrical network a method of plotting the latter which is different from usual geometrically drawing method is presented in this paper.
本文论证了电网络中对偶性的物理基础是能量分布相似性。
The physical basis of duality is attributed to the analogy of energy distribution in the electrical network.
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