permanent magnet speaker 中文意思是什麼
permanent magnet speaker
解釋
永磁式揚聲器-
No, even thought the magnet in speaker is a permanent one and also can form costant magnetic field but cannot be used for health care
不可以作為保健用磁。報廢的廣播喇叭磁塊,雖然也是一種永久磁體,也可以產生恆定的磁場,卻不可以作為保健用磁。
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