... nitrogen, industrial argon,industrial hydrogen, industrial helium,carbon dioxide etc.As one of the biggest gas ... products to meet the ever-increasingly challenging market, carbon monoxide, carbon tetrafluoride, nitric oxide, sulfur hexafluoride, methane,ethane ... oxide, ethylene, propylene, helium,argon,nitrous oxide, carbon dioxide,fluoromethane,difluoromethane,trifluoromethane, welding gas, special gas ...