... mechanical, Mold,Paper machinery,Pharmaceutical Machinery centrifuge,Piston rod,Hydraulic cylinder,Helical rod,Metallurgical Machinery,Wind power,Hydropower,Motor ... .Easy to operate.Pricinple:According to the plastic deformation metal in the normal temperature and apply superfinishing equipment ... from a special materials on the cutter head,during process,the ball impacts the surface 30,000 times per ...