Gas Cylinder, Gas Tank, Oxygen Cylinder manufacturer / supplier in China, offering ISO CE 1L-80L Manufacturer of Seamless Steel Cylinders Oxygen/CO2 /Nitrogen/Helium/Argon /Mixed Air Bottle Gas Cylinders, 1L-80L Manufacturer of Seamless Steel Cylinders Oxygen/CO2 /Nitrogen/Helium/Argon /Industrial Gas Cylinder, 116mm 2.7L 200bar 2kg Steel Seamless CO2 Gas Cylinder W21.8-14 DIN477 Tped Carbon Dioxide Cylinder and so on.