... welding pure argon gas, 99.99% purity argon gas/industrial gas/welding gas,argon gas for weldingMain market: ... , Fourier Transform Infrared; Gas Chromatography - High Efficiency Discharge Detector, Ultrasonic detector, carrier gas when analyzing hydrogen in ... processingIndustrial nitrogen ≥99.5GB-T3864-1996CylinderReplacement gas and protection gas for chemical industry, metallurgy, and electric ...