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Do permanent magnet generators made of neodymium magnets exist? If so, are they more efficient than the normal generators or are they just too expensive to produce? - Quora
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N42 Magnet Arc Segment 2.36" Diameter OR30xIR5x45DEGx5mm DIY Moto Magnet for Generators Rotor Wind Turbine Neodymium Magnet 8 Pack: Amazon.com: Industrial & Scientific
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