Sales of mechanical equipment; manufacturing of general parts; manufacturing of metal cutting and welding equipment; manufacturing of metal tools; manufacturing of metal forming machine tools; manufacturing of specialized machinery for building materials production; manufacturing of metal processing machinery; manufacturing of metal structures; sales of metal materials; sales of metal products; sales of metal tools; sales of building materials; sales of metal cutting and welding equipment; sales of metal forming machine tools; sales of plastic products; sales of rubber products; wholesale of hardware products; sales of motor vehicle charging; non-residential real estate leasing; import and export of goods; road freight transport for ordinary trucks with a total mass of 4.5 tons or less (excluding network freight and dangerous goods).