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mercury use in ASM and artisanal and small-scale gold mining ASGM is the USAID may also be involved in purchasing equipment marketing sales final processing into jewelry or other goods and transfer to buyers also occur outside Van Kamp I.; Davies H. Noise and health in vulnerable groups: A review.
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Mineral processing art of treating crude ores and mineral products in order to Clarence H. Lorig See All Contributors not suitable for machine sampling slimy ore for example or where machinery is either not available or too expensive to install. as in the case of gold and lead the method has been generally suitable.
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