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Priority to NL6515826ApriorityCriticalpatent/NL6515826A/xx
Publication of NL6515826ApublicationCriticalpatent/NL6515826A/xx
E02F3/88—Dredgers; Soil-shifting machines mechanically-driven with arrangements acting by a sucking or forcing effect, e.g. suction dredgers
E02F3/90—Component parts, e.g. arrangement or adaptation of pumps
E02F3/902—Component parts, e.g. arrangement or adaptation of pumps for modifying the concentration of the dredged material, e.g. relief valves preventing the clogging of the suction pipe