| 单词 | spiral pump | 
| 释义 | > as lemmasspiral pump   spiral pump  n. ΚΠ 1728    E. Chambers Cycl. at Screw  				Archimedes's Screw, or the Spiral Pump, a Machine for the Raising of Water. 1815    J. Smith Panorama Sci. & Art II. 120  				If we wind a pipe round a cylinder, of which the axis is horizontal, and connect one end with a vertical tube, while the other..is at liberty to turn round.., the machine is called a spiral pump. a1884    E. H. Knight Pract. Dict. Mech. Suppl. 842/1  				Spiral Pump, a pump that raises its water by a spiral flange or screw, on the principle of the Archimedean screw. < as lemmas  | 
	
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