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The Punjab Factory Rule. ... steel Smelting of iron ore Iron or steel ... safety ventilation system using one or more motor driven centrifugal fans ...
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information on cyanide leaching of gold ... One is the MerrillCrowe zinc precipitation process and the other is the ... but for a good oxide gold ore, ...
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version . Abstract— Since ... aluminum, iron ore, tin, nickel, zinc, lead, ... In search of Mali''s goldmining revenues", 2006: 59). Using World Bank data, ...
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