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- By CategoryMixed GasesGas Comp Amount299.9730000Gas Comp Amount195.9700000 99.9750000 99.9997500 79.7450000 79.2000000 78.4000000 85.0000000 270.0000000 86.1130000 80.2000000Gas Comp 1HELIUM 3 NITROGEN NITROGEN DIOXIDE PPM NITRIC OXIDE