Pumps in the nature of electric pumps and as parts of machines; sump pumps for liquids, sludge, suspended matter or floating materials on water surfaces; electric pumps for fountains, swimming pools, aquariums, water treatment systems and sprinkling devices; electric wet pit pumps, universal pumps, industrial pumps, pumps for chemicals, in particular acid proof pumps, coolant pumps, parts for the aforesaid electric pumps