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Chrome cast grinding iron balls large capacity double ,application: good quality used in mining, cement, power plant etc. capacity: 50, onsyear improvement: 1.diameter: m-m. 2.high hardness: surface hardness of casting balls is up to hrc and volume hardness of foundry steel balls is up to hrc. 3.high impact toughness. 4.low broken rate: the actual broken rate is not higher than 1%. 5.wear-resistant: the grinding lost
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