上行车

He was covered with bruises after falling off his bicycle.

他从行车上摔了下来, 摔得浑身伤痕。

This motorcyclist who is motorial is cycling in the motordrome.

这个有运动神经的摩托车手在赛车道路上骑行车。

He has a bicycle with lights powered by a dynamo.

他行车上的灯由发电机提。

I had to strap the bag to my bicycle.

我得用子把包行车上。

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.

摘要介绍了行车上使用的花鼓式发电机的演变过程，分析了所用磁石，即铁氧体或钕铁硼的性优劣，并进行了市场前景展望。