Screw pump different applications and handling fluids with varying characteristics. Each ‘screw pump' operates on the same basic principle of a screw turning to isolate a volume of fluid and convey it. However, the mechanical design of each is different. The primary difference is the number of screws: one, two, three or more. The screw pump was described by Archimedes on the occasion of his visit to Egypt. This suggests that the apparatus was unknown to the Greeks before Hellenistic times. A cuneiform inscription of Assyrian king Sennacherib (704–681 BC) has been interpreted by Stephanie Dalley to describe casting water screws in
Montes Archimedes coordinates of this range is 25.3° N, 4.6° W. The peaks of Montes Archimedes occupy an area with a maximum diameter of 163 km, although the most rugged portion of the terrain is concentrated within the central 70 km. The remainder of the peaks are scattered across the plateau, with no particular structure or pattern. Some of the peaks in this range achieve heights of up to 2.0 km, much less than those in the Montes Apenninus, for example, and none have received specific designations. Montes Archimedes Montes Archimedes is a mountain range on the Moon. It is named after