微波器件及电路 Microwave Device and Circuitry 微波铁氧体器件 Microwave Iron Oxide Elements
铁磁学 Ferromagnetics 铁电材料与器件 Ferro-Electric Material and Element 铁电压电材料与器件 Ferro-Voltage Electric Material and Element 铁氧体材料 Ferrite Material
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