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See Chinese contents: GB/T 2565-2014 GB/T 2565-2014: Determination of grindability index of coal -- Hardgrove method
This method specifies the method summary, reagents and materials, instruments and equipment, coal sample preparations, instrument calibration, determination procedures, result calculation, method precision, and test report, etc., of using the Hardgrove methods to determine the grindability index of coal.
