Drawing To Make Gold Hand Dredge

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2019-10-11repeated failures in attempts to work gold-bearing gravels by means of suction-dredges have created the impression that this method is impracticablehe suction-dredges have failed from three special causes excessive wear and frequent breakage of pump-shell, runners and liners inability to dredge compact gravel which would not readily move towards the intake and, most important of all.

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