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Crusher - Wikipedia, the free encyclopediaA crusher is a machine designed to reduce large rocks into smaller rocks, gravel, or rock dust. . The earliest crushers were hand-held stones, where the weight of the stone provided a boost to muscle power, used against a ... The VSI crushers utilize velocity rather than surface force as the predominant force to break rock.utilisé ston crasher,grinding machine and jaw crusher chinaAug 2, 2016 . cone stone crusher machine china market leadership in China with its . grinding machine manufacturer,sand grinding .. utilise crushing and.