Development of Mobile Impact Crusher BR480RG - Komatsurecently developed BR480RG (Photo 1) and put it on the market on the basis of a new concept. Fig. 1 Demand for stone crushers in the United States. Units. 800.impact crusher states,Crushers NEW & USED - GrinderCrusherScreenJaw, Impact, and Cone Crushers for rock, concrete, and more. . on Engine: 1800 F.O.B.: Mountain States USA - NU Notes (according to the most recent owner.