| 翻訳と辞書 | Magnet keeper| Magnet keeper  : ウィキペディア英語版 | 
 A magnet keeper, or armature is a ferromagnetic bar made from soft iron or steel which is placed across the poles of a permanent magnet to help preserve the strength of the magnet by completing the magnetic circuit; it is particularly useful for magnets which have a low magnetic coercivity, such as Alnico magnets.
 Keepers also have a useful safety function as they stop external metal being attracted to the magnet.
 
 
 
 抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』
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