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, used against a stone anvil.stone and gravel crushers,Gravel - WikipediaGravel /ˈɡrævəl/ is composed of unconsolidated rock fragments that have a general particle . Gravel often has the meaning a mixture of different size pieces of stone mixed with sand and possibly some clay. American . Also known as "crusher run", DGA (Dense Grade Aggregate) QP (Quarry Process), and shoulder stone.
stone and gravel crushers