Ferromagnetic kind material after magnetization, the internal magnetic light-induced very neat, the direction to align, magnetic strengthening, constitutes the magnet.
铁磁类物质磁化后，内部的磁畴整整齐齐、方向一致地排列起来，使磁性加强，就构成磁铁了。
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This paper introduces a new type of magnetic flux measurement devices, which USES fluxmeter with measurement coil and measuring devices to measure internalmagnet flux.