电镀铜制品并使用平面不锈钢帽。
The nickel-coating brass body & grinding stainless steel cap.
在此基础上，对绝缘子及钢帽的形状进行了优化设计，试图使其耐压得到改善。
On this basis, the optimal designs of the shapes of the insulator and its steel cap are completed in an attempt to improve the voltage withstanding (?)capacity of the insulator.
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。
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.
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