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Machines, namely, machines and apparatus for operating underwater, namely, cleaning and anti-fouling cleaning machines and apparatus for underwater surfaces; machines and apparatus for the treatment of anti-fouling paints, non-anti-fouling paints and of marine growth on underwater surfaces including ship's hulls in particular, namely, non-abrasive blast cleaning machines for cleaning surfaces; fluid flow devices for use with machines and apparatus, namely, fluid power component kit for machine control comprising pumps and valves; fluid flow machines and apparatus, namely, cleaning and anti-fouling cleaning machines and apparatus for underwater surfaces using fluids; fluid handling machines and apparatus, namely, cleaning and anti-fouling cleaning machines and apparatus for underwater surfaces using fluids; fluid pumping installations, namely, fluid pumping machines; machines and apparatus for transferring liquid materials, namely, cleaning and anti-fouling cleaning machines and apparatus for underwater surfaces; heat transfer machines and apparatus, namely, heat transfer presses; machines and apparatus including those utilizing heat and steam for cleaning ship's hulls and other underwater surfaces, namely, machines for cleaning surfaces using fluids