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The eight round of the curved rail side dump car ( rollover car ) has a large volume, stable running off the road, unloading stability, does not need to be welded and fixed roller beam in the curved rail, by its own weight during unloading does not appear on the roll-over phenomenon, rail damage and extend the rail life. The wheel is patent wear washer device waterproof and dust entering into the bearing. Four pairs of wheel steel wheel box eight minimum geometric volume in 6 cubic meters, carriage, Wuhan Iron and steel frame with GB steel, carbon dioxide arc welding welding, unloading roller device containing manganese casting, withstand repeated bearing opening action is not easy deformation. Bearing defects are cylindrical bearing Wafangdian group instead of ball bearings, long service life, bearing to run larger. Since the pour rollover car suitable for entry by electric locomotive traction tonnage of transportation, thereby improving the overall main roadway mechanical operation line matching ability.