This series of counter crushers,which are characterized by reasonable design,big reduction ratio,low energy consumption,high output,easy maintenance etc, are the ideal equipment for the making of aggregates for industries as high-grade road construction,railway construction,hydroelectric power,chemicals,fire-proof materials of buildings,ceramics,and glass etc.Such crushers are especially suitable for the crushing of various kinds of materials with compressive strength no more than 250Mpa like cobblestone,basalt.