Castors and wheels are everywhere on all our cars, planes, machines, trains, machinery, equipment, and even if you look down now, they may even be on your office chairs. It's probably a component that you have never spent much time thinking about. Nor should you! Castors and wheels are a part of every day life, and experts agree that the invention of the wheel in Mesopotamia in the 5th Millennium BC, was one of the most important developments ever made. In the late Neolithic period, they…
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