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What is the function of the ring magnet on the rotor of DC motor? - Magnet FAQ - Courage Magnet Factory
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N42H NdFeB Arc Segment OR18xIR14x45deg.x20mm Strong Motor Magnets for Generators Wind Turbine Rotor Neodymium Permanent Magnet 36mm Diameter 20mm Height 8 Pack: Amazon.com: Industrial & Scientific
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