Two engineers are working on a way to save all the lost energy wasted when people push though the thousands of revolving doors in New York City.
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Invention Nation: Revolving Door Generator
Two engineers are working on a way to save all the lost energy wasted when people push though the thousands of revolving doors in New York City.
Added: May 4, 2009
Views: 3829 Views
Runtime: 03:14
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