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- By CategoryMixed GasesGas Comp 3HELIUMGas Comp Amount284.7750000 88.5000000 99.8200000 99.9550000 99.9935000 99.9670000 79.0000000 81.9375000 99.8810000 99.7700000 61.0000000 99.7140000 35.0000000 99.9975000Gas Comp 2CARBON MONOXIDE 18 HELIUM R134A TETRAFLUOROETHANE NITROGEN NITRIC OXIDE PPM ETHANOL AMMONIA