On the basis of operational principle of bladed fluid machines, a wicket-gate-free axial-flow water-power recoverer was researched and developed.

基于叶片体机械的工作原理研究开发出一种无活动导叶卧轴能回装置。

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.

绍了自行车上使用的花鼓发电机的演变过程，分析了所用磁石，即铁氧体或钕铁硼的性能优劣，并进行了市场前景展望。