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Pulling-whistle / Pulling-whistle


Pulling-whistile was a toy in our childhood.It rotates the disk quickly by the wrapping thread.Pulling-whistile emergency portable source combines the pulling-whistile and portable sourse.When we can’t get way ogcharging we could use it.It transforms the mechanical energy into electric energy.And what’s more,we may hear the sound of wind.


Yanshan University

Yanshan University
Qinhuangdao, China


Yanshan University

Yanshan University
Qinhuangdao, China

Chunlei Shi Wei Shang Tianyu Li Xudian Guan