Many problems caused by radome are the result of asymmetric electric parameters of dielectric material, which means it has no magnetic character 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。
Microelement in the nanostructured composite permanent magnet can reform the microstructure of the permanent magnet, and increase the hard magnetic character 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。
Work principle of magnetic railings ruler and application small machine character is introduced.
介绍了磁栅尺的工作原理及其在中小型镗铣床上的应用特点。
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