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Franklin Institute in Philadelphia has a similar gear reduction setup attached to a hand crank on one side and a metal trash can within a vice on the other side
by ewindisch 11y ago
Franklin Institute in Philadelphia has a similar gear reduction setup attached to a hand crank on one side and a metal trash can within a vice on the other side. Children (and adults) are invited to crank the handle and turn the gears. It takes months to crush each can which is then replaced.