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See Chinese contents: GB/T 15224.3-2022 GB/T 15224.3-2022: Classification for quality of coal -- Part 3: Calorific value
This document specifies the classification, naming and inspection of coal calorific value according to the range of high calorific value on dry basis (Qgr,d). This document is applicable to the exploration and evaluation of coal resources. It guides the production, processing and utilization of coal.
