middle chrome grinding Ball:1:high hardness 2:little breakage 3:low wear rate 4:We own two automatic production lines middle chrome grinding Ball Our products used in many field,such as, cement,power,industry,chemical,mine,station and so on.the new products is high hardness,litter breakage,low wear rate,good wear-resistantno mal-roundness,Guoyang wear-resisant materials are making frist class ...