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- By CategoryMixed GasesGas Comp Amount220.9000000Gas Comp Amount179.1000000 99.9000000 99.9946000 99.8375000 78.7500000 99.8647000 68.0000000 20.8000000 99.9800000 99.6400000 99.9937000Gas Comp 1PPM NITROGEN DIOXIDE NITROGEN ARGON OXYGEN