We can supply all kinds of high purity gas, such as oxygen,argon, nitrogen, CO2, helium, etc. ... industry.hydrogen≥99.9GB-T3634-1995bottle/cylinderChemical industry, glasses, synthetic cut stone.CO2≥99.8GB-6052-85bottle/cylinderChemical industry, welding ... stainless steel smelting, container, steel structure manufacture, mold processing, etc. High purity argon gas