以下为句子列表：
英文: By using the Maxwell's equations and axial symmetry, a method on calculating non-static axial symmetry fields with unstable charge source is given.
中文: 摘要利用麦克斯韦方程组和场的轴对称性，给出了由对称轴的非静态电场计算含不稳定电荷源的轴对称非静态空间电磁场的一种方法。
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英文: The velocity field has been designed in this article on defect of rolling workpiece surface about cross wedge rolling technique in the process of forming axial symmetry spare parts by result of simulated experiment of consult document [4].
中文: 摘要依据文献[4]的模拟实验结果，拟定了楔横轧工艺成形阶梯轴类件时轧件表面出现表面缺陷（蛇皮状或鱼鳞状缺陷）时的金属流动速度场。
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