电力系统电磁场计算球形线圈的磁场 （毕奥萨法定律、解边值问题、ansys 、实验） 重点计算实验测量点处磁场的数值-Magnetic field (Bi Osa French law, solutions to boundary problems, ansys, test) power system calculation of electromagnetic field coil spherical focus of computing numerical experiments me