Permanent magnets (permanent magnets), permanent magnets, can be natural products, also known as natural magnets, can also be manufactured (the strongest magnet is neodymium iron boron magnet). With a wide hysteresis loop, high coercivity, high remanence, once magnetized, it can sustain a constant magnetic material. https://www.meank-magnet.com/characteristics-and-application-of-permanent-magnets.htmlAll Rights Reserved
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