80L Gas Cylinder for Truck,Car,Bus 1 Certificate: ISO11439 and BV 2 ... Our company possesses the manufacture licenses of pressure vessels for grade B1,B2,B3,D1 and D2, as well ... at the Provincial and National Level. The brand "Silver Arrow" has been awarded as" Hunan Famous Trademark". These ... and Casualty Co. Ltd. These 80L Gas Cylinder for Truck,Car,Bus is manufactured by self-designed four-axle ...