General projects: steel and iron smelting; steel rolling processing; coking; mineral processing; metal material manufacturing; metal structure manufacturing; sales of metal materials; sales of metal structures; sales of coal and products; sales of metal ores; sales of nonferrous metal alloys; sales of renewable resources; processing of metal scraps and chips; metal cutting services; processing of renewable resources; recycling of renewable resources (except productive scrap metal); recycling of productive scrap metal; iron