永久磁性
- 网络permanent magnetism
永久磁性-
直到19世纪证明了磁是电产生的那个时候，人们才开始对永久磁性的本质作认真的研究。
It was not until the19th century , when magnetism was shown to be the product of electricity , that serious research into the nature of permanent magnetism began .
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使物质暂时或永久具有磁性的过程。
The process that makes a substance magnetic ( temporarily or permanently ) .
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利用永久磁体及磁性磨料对零件表面进行研磨，是磁力研磨中的一种新方法。
To grinding part surfaces with permanent magnet and magnetic grains is a new method of magnetic grinding .