Brushes for vacuum cleaners; Central vacuum cleaning installations; Dust exhausting installations for cleaning purposes; Dust filters and bags for vacuum cleaners; Dust removing installations for cleaning purposes; Electric machines and apparatus for carpet shampooing; Electric wax-polishing machines for industrial purposes; Electric window cleaning machines; Food waste disposers; Garbage disposal units; Mud dredging machines; Pigs for cleaning pipes; Self-propelled road sweeping machines; Se...