... other gas specification: Product nameTechnical index(%) StandardUnitApplicationIndustrial oxygen ≥99.5GB-T3863-1995CylinderSteel cutting, welding, ... chemical industry, metallurgy, and electric industry.Industrial hydrogen ≥99.9GB-T3634-1995CylinderChemical industry, glasses ... industry, electronic industry, lamp, analysisHigh Purity Oxygen ≥99.999GB/T14599-93CylinderCutting, electronic industry, ...