... Gas 50%N2O+50%O22Medicinal Gas Mixtures≥99.999%N2,O2,CO2,C2H4O,Constituent content As Demand3Sterilizing Gas Mixtures C2H4O, ... shielding gas mixturesbalance gas :He or Ar,N2CO2,H2,O2,N2,He,CH4,Ar,Constituent content As Demand7Keep fresh gas ... mixtures N2,CO2,O2,Constituent content As Demand8Calibration gas mixures fro Auto Exhaust Testingbalance ...