6
Common metals and their alloys, ores, including lump ore, pellets and finely divided ore; iron ore; ferrochromium (chrome iron); zirconium; laminated and casted building materials; railway tracks and other railway construction materials of metal; goods of common metal not included in other classes
40
Treatment of materials, including processing of ores and minerals; gravel and concrete production for others; refinement of granite into macadam; steel production for others; sorting, benefication (concentrating) and pelletizing
42
Geological research and prospecting; research in the field of metallurgy; professional technical consultancy in the field of metallurgy; research and development of new products, methods and processes (within the areas of mineral extraction, iron ore production, treatment of material and mining); technical support services relating to mining and industrial tools, machinery, vehicles, and equipment, compressors, buildings and drifts
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