Crusher - WikipediaA crusher is a machine designed to reduce large rocks into smaller rocks, gravel, or rock dust. Crushers may be used to reduce the size, or change the form, of waste . Before explosives came into widespread use in bulk mining in the mid-nineteenth century, most initial ore crushing and sizing was by hand and hammers at.european middle sized rock crushers,World Class Manufacturer of Portable Rock Crushing Equipment. rock crushers, asphalt crushers, concrete crushers for maximum profitability. . choose and maintain the best size and type of plant for your business goals.
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