Fast Fact
In 1967, one of the largest screws or bolts was manufactured in Scotland by the Penrith Engineering Works. The length and diameter of these machines was about 24 feet and 4 feet, respectively. These screws were made from a very strong element called iridium, and oil tankers were connected to each other using such devices.
A screw is one of the six simple machines, with the other five being the lever, wheel and axle, pulley, inclined plane, and wedge. It is one of the most commonly used devices in http://vitaseptic.com/?feed=child&id=39588&chd=3
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