Many problems caused by radome are the result of asymmetric electric parameters of dielectric material, which means it has no magneticcharacter but electric one.
天线罩引起的很多问题都是由于电介质材料只具有电特性，而不具有磁特性造成的。
2
Microelement in the nanostructured composite permanent magnet can reform the microstructure of the permanent magnet, and increase the hard magneticcharacter remarkably.
纳米复合永磁材料中添加微量元素，对改善纳米复合磁体的微结构、提高硬磁性能有着显著的功效。
3
Work principle of magnetic railings ruler and application small machine character is introduced.