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Standard Hardness For Grinding Ball Zimbabwe

Mar 23 2017 The grinding ball hardness at 0.5 R depth o determined on a flat surface area prepared in accordance with the requirements GOST 9012 and GOST 9013 by removing grinding ball metal to desired depth. At distance of 12 radius perform four hardness measurements on two mutually perpendicular lines. The minimum and the maximum hardness values ignore .

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