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- By CategoryMixed GasesGas Comp Amount20.5000000Gas Comp Amount199.9999500 99.9749500 99.7900000 99.9832000 81.9770000 81.9820000 79.6000000 87.0925000 77.4550000 99.9967000 0.5000000Gas Comp 1PPM NITROGEN DIOXIDE NITROGEN OXYGEN ARGON