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- By CategoryMixed GasesGas Comp Amount20.5000000Gas Comp Amount181.9770000 87.0925000 99.7900000 99.9999500 81.9820000 99.9739500 17.5000000 0.5000000 77.4550000 99.9749500 95.9700000Gas Comp 1PPM NITROGEN DIOXIDE OXYGEN ARGON NITROGEN