Floor cleaning machines; cleaning appliances utilizing steam, namely, steam cleaning machines and multi-purpose steam cleaners; hot and cold water cleaning machines for cleaning surfaces using high pressure water; sand-blasting machines; hydro-sand-blasting machines; motorized electric floor sweepers; automatic electric motorized floor scrubbers for cleaning all types of hard and soft surfaces; electric and manual traction floor scrubbing and drying machines for cleaning all types of hard and soft surfaces; carpet and armchair cleaning machines; dry vacuum cleaners; wet vacuum cleaners; single disc floor cleaning machines; floor polishers; structural parts and replacement parts for all aforementioned machines, namely, vacuum cleaner motors, boilers being parts of steam engines not for land vehicles, pressure adapters, ejectors to aspirate detergent solution, solution and water tanks, dump trays for clearing debris, removable and transportable solution and water recovery tanks, anti-foam head attachments for cleaning machines, detergent mixing machines and power-operated detergent dispensers for machines, vacuum cleaner hoses, discharging hoses, high and low pressure washing machine hoses, flexible hose couplings for machines, lances for pressure washing machines, power-operated spray guns for pressure washing machines, containers for holding cleared debris, emulsion oil squeegee blades, wheels and non-marking wheels, brushes, circular and cylindrical brushes, rotary brushes, roller brushes, squeegee blades, rotary machine heads for machines, self-adjusting and leveling washing and sweeping heads, polishing disks for cleaning and dewaxing, pad holders, power-operated mechanical hose reels for flexible hoses, filters, inlet and outlet filters, self-cleaning filters, filter bags made of polyester, fabric filters, cartridge filters and paper filters; all of the foregoing, excluding mechanical shaft seals for industrial machinery