Shopping cart wheels are made from the same material as roller coaster wheels. Every cart must be tough enough to haul groceries for a decade. At a cost of $100 each, shop owners are keen to keep these rugged buggies on the job. Meet the hidden device that helps keep them out of the hands of thieves and close to home.
MACHINES: HOW THEY WORK
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Tagged under: machines work,mechanical engineering, machines,shopping carts,cart design,loss prevention,locking wheels,theft prevention,shopping cart wheels,science channel
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