Abstract: In many power electronic applications ferrite cores of magnetic compon ents are biased with a DC or low-frequency premagnetization.
摘
: 在电力电子技术中应用
铁氧体铁心磁性元件,其铁心中往往存在直流或低频交流预磁

况。
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An ENT doctor is trained to treat a wide range of conditions including ear infections, hearing loss, sinusitis, allergies, tonsillitis, laryngitis and cancers of the head and neck, as well as being experts of airway management.
耳鼻喉科医生接受过广泛训练,可
治疗包括耳部感染、听力损失、鼻窦炎、过敏、扁桃体炎、喉炎
及头颈癌等多种疾病,并且他们是气道管理方面的专家。