He has a bicycle with lights powered by a dynamo.
他
行车上
灯由发电机提供能源。
复数形式）He has a bicycle with lights powered by a dynamo.
他行车上灯由发电机提供能源。
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
行车上使用花鼓式发电机演变
程，分析所用磁石，即铁氧体或钕铁
能优劣，并进行市场前景展望。
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分类均由互联网资源
动生成，部分未经
人工审核，其表达内容亦不代表本软件
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