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Screening And Methods Of Processing Gold Ore Systems

Screening And Methods Of Processing Gold Ore Systems

From the old-fashioned grab-sample to the modern timing- device, which takes a machine-sample with mathematical precision, there is a wide gap, which was only crossed by many years of toil and unremitting endeavor. Even to-day, notwithstanding the advancement in the art, grab-sampling is still practicedsometimes to afford the unscrupulous mine-promoter a basis for fairy ...

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