7 MACHINES AND MACHINE TOOLS FOR USE IN CLEANING, CUTTING, STRIPPING, POLISHING, SCOURING, ABRADING AND SAND BLASTING OF MATERIALS, MOTORS AND INTERNAL COMBUSTION ENGINES FOR INDUSTRIAL USE, MACHINE COUPLING AND TRANSMISSION PARTS, INDUSTRIAL CLEANING MACHINES, COMPRESSORS, MACHINES AND PARTS THEREOF FOR USE WITH PRESSURIZED LIQUIDS FOR WASHING AND CLEANING, MACHINES AND PARTS THEREOF FOR STRIPPING AND CLEANING SURFACES THAT UTILIZE HEAT AND STEAM, SAND BLASTING MACHINES AND PARTS THEREOF, AND PARTS FOR ALL THE AFOREGOING MACHINES