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
53/00 Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00