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Neodymium-Iron-Boron Magnets (NdFeB)

Rare-earth permanent magnets used in laptop cooling fan motors, hard disk drive actuators, and speaker drivers. China produces >90% of finished NdFeB magnets and dominates rare-earth processing.

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1 essential American goods rely on neodymium-iron-boron magnets (ndfeb) somewhere upstream in their supply chain.