When curvature radius is larger the results for rectangular and cylindrical coordinate are the same.

当曲面曲率半径较大时,用柱坐标与直角坐标计算差别很小.

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Tree initiation voltage and electrical tree shape of different curvature radius of needle tip were measured.

采用针板电极结构,测量了不同针尖曲率半径的起树电压和电树枝形态.

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