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ball mill for plant sample grinding latvia

2016-9-9grinding in the planetary ball mill retch pm400 with 300 rpm for 4 or 30 min replace 20 or 40 of cement. barley ash ba from local heating plant furnaces grinding in the planetary ball mill retch pm400 with 300 rpm for 4 or 30 min. waste glass . comparing with reference sample without poolans when they are added to replace up to 20 of .

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