Type GQ70 tank car for carrying light oil is mainly used for carrying petrochemicals such as gasoline,kerosene and light diesel oil.The whole car is welded structure fully made of steel without middle beams, mainly consisting of tank body,devices of traction beam and sleeper beam,brake device,coupler and draft gear,bogie etc, it's upper loading and bottom unloading type.Brake device adopts type 120 control valve,spinning sealed brake cylinder of 305X 254,type ST2-250 slack adjuster and empty and load changeover valve,coupler and draft gear are equipped with #17 coupler (which is made of E classsteel) and MT-2draft gear.The car adopts Type K6 bogie.