In the plastics industry, twin screws are at the very heart of the extrusion process that transforms raw materials into rigid PVC pipe or profile. These highly engineered components are integral to ...
ABERDEEN PROVING GROUND, Md. (Aug. 7, 2012) -- PVC pipe, screws, an irrigation valve cover, an aluminum paint grid and a bicycle inner tube. What do they have in common? They're all part of a kit to ...
Introduction Can you think of a way to make water run uphill—without using electricity? The ancient Greeks discovered how to do just this! They developed a device called the Archimedes screw to lift ...
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