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Keywords: Primary Copper Smelter Process.svg US EPA document Source Classification Codes are given in parentheses 2015-07-22 raster http //www epa gov/ttn/chief/ap42/ch12/final/c12s03 pdf US Environmental Protection Agency figure 12 3-1 <br /> vector own raster US Environmental Protection Agency <br /> vector Mliu92 other versions Translation possible PD-USGov Uploaded with UploadWizard Copper industry Copper smelters |