... Absorption, Fourier Transform Infrared; Gas Chromatography - High Efficiency Discharge Detector, Ultrasonic detector, carrier gas when analyzing hydrogen in helium. Used in semiconductor ... 85CylinderChemical industry, welding, casting moldIndustrial helium ≥99GB/4844-95CylinderElectronic industry, leak testing, floating balloon.Dissolved acetylene ≥98GB6819-1996CylinderWelding, cutting, heating, ...