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SMALL SCALE GOLD MINING AND MARKETING IN PAPUA NEW GUINEA Professor Surek Bordia Professor and Head Department of Mining Engineering PNG University of .
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SMALL SCALE GOLD MINING AND MARKETING IN PAPUA NEW GUINEA Professor Surek Bordia Professor and Head Department of Mining Engineering PNG University of .
Ball Mill. Ball mills are used primary for single stage fine grinding, regrinding, and as the second stage in two.
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