采用将圆电流磁矢势表达式中一部分展成级数，使被积函数变成可积分的函数。
A part of results on magnetic vector potential of circular loop are expanded, so the integral function is transformed to integrable series.
建立了圆棒阴极展成电解加工的数学物理模型并以计算机求解，根据计算结果提出了加工间隙的简便算法。
The physic mathematical model of electrochemical contour evolution machining using a round cathode is set up and solved on a computer.
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