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Impact crusher is widely used for crushing stone in mining, highway, railway, construction, etc. It is an irreplaceable crushing equipment for high-grade sand and gravel. Working principle: Impact crusher is a kind of stone crusher using impact energy.Joyal-Stone Crusher,Stone Crusher Machine,Rock Crusher,,Joyal-Stone Crusher,Stone Crusher Machine,Rock Crusher,Rock Crusher Machine Price Manufacturer From China,Joyal Stone Crusher Or Rock Crusher Includes Jaw Crusher,Cone Crusher,ZYS Cone Crusher,Impact Crusher,Hammer Crusher,and other quarry crushers,aggregate crusehrs,ore crusher,if you want to buy joyal stone crushers,you can contact us!Construction equipments - Introduction and Classification,Aug 30, 2014· Construction equipments - Introduction and Classification,If the rods are replaced by steel balls to provide the impact required the grind the stones, the crusher are known as the ball mill crusher. The size of the balls generally used is 50 mm dia. Size. 53.