Special kinds of imported grinding wheel 
 1, grinding wheel 175 × 75 × 55 
 2, cup wheel 6 × 3 × 5 / 8''-11 
 3, bowl-shaped grinding wheel 5 × 2 × 5 / 8''-11 
 4 Flat wheel 8 × 1 × 5 / 8'' 
 5, grinding wheel bolt: 150 × 75 × 55-4 × M8 200 × 80 × 130-4 × M10 
 Applies to: grinding rail top, side, and the Ministry of arc for welding of rail joints, rail side of the flash, and other parts of rail surface grinding welding repair