This watch operates on mechanical energy (which converted from the chemical energy stored in the batteries).
Littlefield Residence Hall
By Elaine Lui
Showing posts with label watch. Show all posts
Showing posts with label watch. Show all posts
Friday, November 8, 2013
Energy - Watch
This watch operates on mechanical energy (which converted from the chemical energy stored in the batteries).
Littlefield Residence Hall
By Elaine Lui
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