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- By CategoryMixed GasesGas Comp Amount299.9950000Gas Comp Amount199.9917500 99.9910000 99.9948400 74.9500000 300.0000000 99.9000000 84.0325000 99.9987500 99.9964000 50.0000000 99.9739500Gas Comp 1PPM NITROGEN DIOXIDE AIR PPM AMMONIA NITROGEN HELIUM 3