B3 D110mm Hot Rolling Steel Ball Surface Hardness 58 -59hrc Grinding Media for Chemical industry
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Cement Plants Hot Rolling Steel Balls B2 D60MM Surface Hardness 57-60HRC Super Grinding-Resisting save usage
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Even Hardness Sgs B3 D90mm Hot Rolling Steel Ball Core Hardness 58-59hrc Unbreakable for Cement Plants
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