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- By CategoryMixed GasesGas Comp 4NITROGENGas Comp Amount199.8375000 99.9991805 21.0000000 99.9946000 79.1400000 50.0000000 81.6580000 99.9999990 99.9514000 99.9835000 4.0000000 0.5000000 79.1000000 99.9065000 85.5000000 99.9890000 86.0000000 99.9998800Gas Comp 1PPM NITROGEN DIOXIDE NITROGEN OXYGEN ARGON