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See Chinese contents: JB/T 14329-2021 JB/T 14329-2021: Ring-roller micro powder mill
This standard specifies the type and basic parameters, technical requirements, test methods, inspection rules, markings, packaging, transportation and storage of ring roller micro-powder mills. This standard is applicable to the ring roller micro powder mill for grinding non-flammable and explosive mineral materials, which have Mohs hardness of not greater than grade 6 and relative humidity below 6%, such as gypsum, limestone, barite, fluorite, apatite, feldspar and calcite.
