Mainly applied to metals, non-ferrous metals and non-metallic products, deburring various parts to rust, back round and bright polishing. Particularly applicable to cavity-shaped complex parts of the surface finishing. The grinding machine of this type, after finishing the part, not only to maintain the original shape and position accuracy, but also improve the surface roughness of a part? Two. The models for large-volume, medium or large size parts of the surface finishing.