... excavator and bulldozer undercarriage parts and auto parts,including track roller,top roller,track chains,idler groups,roller,bushings and pins,bolts ... Production Line Capacity Actual Units Produced(Previous Year) Track roller, Top roller, Track rim, Idler, Track link, Cylinder USD 1,580,000 Per ... Eastern Asia USD 486,300 3.0 Western Europe USD 486,300 3.0 Southern Europe USD 324,200 2.0 Domestic Market ...