短語詞組短語alternating current magnetic field 交變磁場alternating impulse magnetic field 脈沖磁場alternating electronic magnetic field 交變電磁場alternating magnetic field sensor 交變磁場傳感器even alternating magnetic field 均勻諧變低頻弱磁場secondary alternating magnetic field 二次交變磁場rotating alternating magnetic field 鏇轉(zhuǎn)交變磁場external alternating magnetic field 交變磁場intermittent alternating magnetic field 間歇式高頻電磁場 返回 alternating magnetic field