最終更新日：2025/11/23
A rare earth magnet, a strong permanent magnet made from alloys of rare earth elements that is far stronger than ferrite or alnico but extremely brittle, is used in many high-performance motors.
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A rare earth magnet, a strong permanent magnet made from alloys of rare earth elements that is far stronger than ferrite or alnico but extremely brittle, is used in many high-performance motors.
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