Sand blasting machines; Shot blasting machines; Air cleaners for engines; Apparatus for cleaning pipes; Apparatus for cleaning tubes; Apparatus for the cleaning of pipelines; Apparatus for the cleaning of tanks; Cleaning guns (pressure washing machines); Cleaning machines for pipe-lines; Cleaning machines for railways; Cleaning machines for roads; Dust exhausting installations for cleaning purposes; Dust removing installations for cleaning purposes; Electric air jet cleaners; Electric vacuum cleaners; Floor cleaning (washing) machines; High pressure cleaning machines; Industrial cleaning apparatus for cleaning boilers; Industrial cleaning apparatus for cleaning condensers; Industrial vacuum machines for cleaning; Machines and apparatus for cleaning (electric); Machines for cleaning floors by suction; Pneumatic tools for surface cleaning (machines); Pressure cleaning machines; Pumps being parts of vacuum cleaners; Pumps being parts of wet cleaners; Steam cleaners (machines); Street cleaning machines; Tube cleaning machines; Vacuum cleaner hoses; Vacuum cleaners; Vacuum cleaners for industrial purposes; Wet and dry vacuum cleaners