Certain metals are attracted to a magnet.
某些金属受
石的吸引。
Certain metals are attracted to a magnet.
某些金属受石的吸引。
She can magnetise a theatre audience.
她能像石般吸引剧院观众。
Evolving process of hub dynamo which used in bicycle is presented. The performance of magnetite viz. ferrimagnetism or NdFeB is analyzed. The prospect of marketing is viewed.
摘要介绍
自行车上使
的花鼓式发电机的演变过
，
所石，即铁氧体或钕铁硼的性能优劣，并进行市场前景展望。
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