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- By CategoryMixed GasesGas Comp Amount39.0000000Gas Comp Amount279.0000000 99.9979000 99.9983000 99.9600000 99.9975000 99.8400000 99.9901000 87.5000000 82.5000000 99.9910000Gas Comp 2NITROGEN CARBON MONOXIDE 18 R134A TETRAFLUOROETHANE PPM ETHANOL AMMONIA NITRIC OXIDE