Construction engineering construction. General items: Manufacturing of pumps and vacuum equipment; sales of pumps and vacuum equipment; manufacturing of gas, liquid separation and purification equipment; sales of gas, liquid separation and purification equipment; manufacturing of hydraulic power machinery and components; sales of hydraulic power machinery and components; road freight transport of general cargo vehicles with a total mass of 4.5 tons or less (excluding network freight and dangerous goods); general mechanical equipment installation services; manufacturing of instruments and meters; sales of instruments and meters; repair of instruments and meters; sales of industrial control computers and systems; manufacturing of industrial control computers and systems; sales of power distribution switchgear equipment; manufacturing of power transmission and distribution and control equipment; sales of intelligent power transmission and distribution and control equipment; manufacturing of electronic components and electromechanical component equipment; sales of electronic components and electromechanical component equipment; processing of mechanical parts and components; sales of mechanical parts and components; manufacturing of agricultural machinery; sales of agricultural machinery; manufacturing of mechanical and electrical equipment; sales of mechanical and electrical equipment; research and development of mechanical equipment; sales of metal products; sales of valves and cocks; sales of plastic products; operation of wires and cables; sales of power facility accessories; repair of electrical equipment; repair of general equipment; repair of specialized equipment; maintenance of electronic and mechanical equipment (excluding special equipment); professional design services; manufacturing of generators and generator sets; sales of generators and generator sets.