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- By CategoryMixed GasesGas Comp 4PPB ETHANEGas Comp Amount199.9690000 99.9994300 99.9948400 53.7860000 81.0420000 99.9739500 50.0000000 99.9020000 99.9700000 99.9892000 77.6000000Gas Comp 1PPM AMMONIA PPM NITROGEN DIOXIDE NITROGEN HELIUM 3
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