He has a bicycle with lights powered by a dynamo.
他自
车上
灯由
提供能源。
He has a bicycle with lights powered by a dynamo.
他自车上灯由提供能源。
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.
摘要介绍了自车上使用花鼓式演变过程，分析了所用磁石，即铁氧体或钕铁硼性能优劣，
了市场前景展望。
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