Research and development of power distribution switchgear equipment; manufacturing of power distribution switchgear equipment; sales of power distribution switchgear equipment; manufacturing of security equipment; sales of security equipment; sales of photovoltaic equipment and components; manufacturing of photovoltaic equipment and components; manufacturing of specialized electrical machinery; sales of power facility accessories; manufacturing of power facility accessories; manufacturing of metal structures; sales of metal structures; sales of metal fittings for construction; manufacturing of power electronic components; sales of mechanical and electrical equipment; retail of electronic components; wholesale of electronic components; sales of power electronic components; sales of electrical accessories; sales of metal products; manufacturing of metal fittings for construction; sales of intelligent power transmission and distribution and control equipment; manufacturing of power transmission and distribution and control equipment; manufacturing of mechanical and electrical equipment; road freight transport of general cargo vehicles with a total mass of 4.5 tons or less (excluding network freight and dangerous goods).