The permanent magnetic material is selected from NdFeB material, and the ferromagnetic material is selected from iron, nickel or cobalt.
永磁体材料选自钕铁硼材料，铁磁性材料选自铁、镍或钴。
The permanent magnetic material is selected from NdFeB material, and the ferromagnetic material is selected from iron, nickel or cobalt.
永磁体材料选自钕铁硼材料，铁磁性材料选自铁、镍或钴。
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