Methods:Because the magnetic field of cup-yoke-type magnetic attachment is stable axial-symmetrical, the authors only analyzed two-dimensional magnetic field of 1/2 section.
方法：钢帽式磁性附着体为轴对称稳定场，所以可对其断面的1/ 2进行二维磁场分析。
In this paper, We study the classification and the properties of their derivation algebras of 2-dimensional Lie triple systems over the complex (real) number field.
本文讨论了复(实)数域上的二维李三系的分类及其对应的导子代数的性质。
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