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mill (grinding) wikipedia
a mill is a device that breaks solid materials into smaller pieces by grinding, crushing, or cutting the grinding of solid materials occurs through mechanical forces that break . ball mills are characterized by their smaller (comparatively) diameter and sa
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ball mill wikipedia
a ball mill is a type of grinder used to grind, blend and sometimes for mixing of materials for use in mineral dressing processes, the axis of the shell may be either horizontal or at a small angle to the the ball mill is a key piece of equipment for grinding