关于 枢纽发电机 （ hub dynamo ），网上有许多的著作都对其特性进行了深入的研究[1]。
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Ditching batteries, however, meant putting a dynamo in the hub, and using the strength of the rider's legs to not only power the bike, but also the lights.
ENGADGET: Engineering a better bicycle with DBC City Bike Design Alt
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