We could supply oxygen gas of purity 99%, 99.9%, 99.99% and 99. ... .996GB/T4844.3-1995CylinderChemical industry, electronic industry, lamp, analysisHigh Purity Oxygen ≥99.999GB/T14599-93CylinderCutting, electronic industry, analysisHigh Purity Argon ≥99 ...