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Center feeding with annular waterfalls falls into hopper: material feeding into, again through the annular aperture falls, is the bulk material plate into two shares. A unit divided tray into the high-speed rotation of the impeller, another from the circumference of the lining plate down, into the impeller material, was rapidly accelerated in the impeller speed out, first with the bulk material another portion of the material around the free fall impact plate broken, and impact to the vortex shaped material around the vortex cavity the lining , is first bounced back to the top of the crushing chamber, after partial steering motion, forming a continuous material curtain and emitted from the impeller material impact, finally discharged.