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Zhonghao Magnetic Materials Co.,Ltd is one of the leading China block shape ndfeb magnet manufacturers and suppliers welcome to wholesale bar magnets, square strong magnetic from our factory. Rare earth permanent magnetic materials is the samarium, neodymium mixed rare earth metals and transition metal (such as alloy of cobalt, iron, etc.), by the powder metallurgy method of pressure sintering, the magnetizing field of a magnetic material Rare earth permanent magnetic materials has become important materials for electronic communication technology, used in satellite and radar