F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
F04 POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
F04B POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
15/00 Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts
F04B15/02 the fluids being viscous or non-homogeneous