GB 9649-1988 Geological and Mineral Terminology Classification Code was changed to GB/T 9649.9-1998 The terminology classification codes of geology and mineral resources--The crystallography and mineralogy.
GB 9649-1988 Geological and Mineral Terminology Classification Code was changed to GB/T 9649.10-2001 The terminology classification codes of geology and mineral resources Petrology.
GB 9649-1988 Geological and Mineral Terminology Classification Code was changed to GB/T 9649.16-1998 The terminology classification codes of geology and mineral resources--The study of ore deposits.
GB 9649-1988 Geological and Mineral Terminology Classification Code was changed to GB/T 9649.17-2001 The terminology classification codes of geology and mineral resources Coal geology.
GB 9649-1988 Geological and Mineral Terminology Classification Code was changed to GB/T 9649.20-2001 The terminology classification codes of geology and mineral resources Hydrogeology.
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