5021111
9781403485977
The most complicated machines often rely on a few simple principles of technology, such as wheels, springs, screws, ramps, and wedges. This series explores these technologies by relating them to common machines in our everyday world from bedsprings to skateboards to zippers. Numerous fact files offer readers fast facts and other pertinent information.Glover, David is the author of 'Wheels and Cranks' with ISBN 9781403485977 and ISBN 1403485976.
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