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- By CategoryMixed GasesGas Comp Amount20.5000000Gas Comp Amount199.9999500 77.4550000 99.9100000 81.9770000 87.0925000 99.7900000 81.9820000 0.5000000 20.9000000 79.4875000 99.9749500Gas Comp 1PPM NITROGEN DIOXIDE OXYGEN NITROGEN ARGON