Electric fans, ventilators and blowers for motors and engines; Power-operated blowers; Dust separators; Dust filters for vacuum cleaners; Dust collecting machines for chemical processing; Dust removing installations for cleaning purposes; Pneumatic blow guns for cleaning and dusting purposes; Spraying machines for dust suppression; Pneumatic blow guns for use in a manufacturing process to blow dust off parts, workstations or wherever necessary; Vacuum cleaners; Electric vacuum cleaners; Hand-...