7 Machines and machine tools, namely, slurry pumps and pumps for pumping of sediment-water mixtures, sediment disintegration tools, namely, cutter heads for the disintegration of sediment, drills and hydraulic power operated hammers; hydraulic apparatus comprised of dredges, pipeline systems for sediment transport and removal comprised of suction heads and ejectors for handling, disintegration, excavation, shifting or removal of solid material and sediment in water, and transport of sediment by water through pipelines and in flumes, all for use below or above a water surface in connection with dam installations or offshore activities