CLEANING MACHINES FOR USE IN CLEANING THE CASING OR LINER OF A WELL BORE OR PIPE; CLEANING MACHINE TOOLS, NAMELY, TOOLS FOR USE IN CLEANING THE CASING OR LINER OF A WELL BORE OR PIPE; PUMPS AND PUMPING MACHINES; FILTERING MACHINES; CASING SCRAPERS AND BRUSHES; PARTS AND FITTINGS FOR THE AFORESAID