Keywords: Spiral pump.JPG en A hand drawn schematic of a coil pump The schematic was based on the image at http //www fao org/docrep/010/ah810e/AH810E06 htm Perhaps that the next version of the image is best no longer see-trough; instead the backside and sides should be hidden entirely by a orange color Own KVDP 2009-09-24 Pumps |