Organic gases: methane/ethane/propane/n-butane/isobutane/ethylene/propylene/n-butene/isobutene/ethylene oxide, etc
Electronic-grade gases: methane/acetylene/ethylene/propylene/hydrogen bromide/nitrogen trifluoride/tungsten hexafluoride/hydrogen/helium, etc
Standard gases: Customized gases and laboratory gases
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