The GMC-12 II type rail polishing car is used for polishing and repairing defects and profiles of rails on lines and turnouts,
such as corrugation, fat edges, fish scales, low weld collapse, and scratches. Repairing and preventive polishing for small radius curve corrugation, fish scale pattern, fat edge and turnout rail damage can effectively reduce the waste of resources when large grinding cars grind curved rails, and make up for the low mechanical efficiency of small grinding cars.