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Difference between revisions of "Helical Screw Blades"
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[[File:Helical screw blades.jpg|thumb|right|Helical Screw Blades]] | |||
The '''Helical Screw Blades''', also called the Archimedean Screws or screwpump, is a machine | |||
historically used for transferring water from a low-lying body of water into irrigation ditches. The screw pump is commonly attributed to Archimedes on the occasion of his visit to Egypt, but this tradition may reflect only that the apparatus was unknown before Hellenistic times and introduced in his lifetime by unknown Greek engineers. | |||