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单词 permanent magnet
释义

WordReference Random House Unabridged Dictionary of American English © 2024
permanent magnet, 
  1. Electricitya magnet that retains its magnetism after being removed from an external magnetic field.
  • 1820–30
permanent magnetism. 

Collins Concise English Dictionary © HarperCollins Publishers::
permanent magnet n
  1. a magnet, often of steel, that retains its magnetization after the magnetic field producing it has been removed
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更新时间:2024/9/22 1:02:08