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This machine uses two driving rollers to crush the materials by the extrusion and grinding forces caused by the relative rotation of the rolling. When the material sent into the machine after the crushing chamber, under the rotating rollers of the nip force,the material was forced through between two rollers, while the crowd by rolling and roller mill cut, the material began to rupture, rupture of small particles along the tangent with the direction of roller rotation, the gap of two rollers, thrown to the bottom of the machine,large gap material particles continue to be broken into small particles and be discharged later.