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20mm 150mm Grinding Media Steel Ball In Mine

2019914performance of casting iron grinding ball 1 high hardness 2o breakage 3ven wearing 4ood wear resistance packing of casting iron grinding ball 1shandong dahe grinding media coltdia 20mm150mm forged steel grinding ball for mining description 1rade 45, 60mn,65mn, b2, b3, b6.