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150bar /200bar High Pressure Seamless Steel Oxygen Nitrogen Hydrogen Argon Helium CO2 Gas Cylinder CNG Cylinder, Find Details and Price about Valve Hydraulic Cylinder from 150bar /200bar High Pressure Seamless Steel Oxygen Nitrogen Hydrogen Argon Helium CO2 Gas Cylinder CNG Cylinder - KAIGEN (SHANDONG) GAS EQUIP CO., LTD.