Crusher - WikipediaA 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, ... This position together with its circular motion gives these crusher buckets the faculty of grinding wet material.grinding stone crsher,Indian Grinding Stone: Native American US | Find great deals on for Indian Grinding Stone in US Native American Collectible Artifacts from Pre-1600. Shop with confidence.
grinding stone crsher