Installation, repair, and testing of power transmission, power supply, and power receiving facilities. General items: sales of mining machinery; manufacturing of mining machinery; repair of general equipment; repair of specialized equipment; repair of electrical equipment; retail of hardware products; packaging services; manufacturing of pumps and vacuum equipment; sales of pumps and vacuum equipment; manufacturing of intelligent basic manufacturing equipment; sales of intelligent basic manufacturing equipment; manufacturing of industrial control computer and systems; manufacturing of bearings, gears, and transmission components; sales of bearings, gears, and transmission components; manufacturing of gears, gear reducers, and gearboxes; sales of gears, gear reducers, and gearboxes; sales of insulation materials; sales of rubber products; sales of metal products; sales of lighting fixtures; sales of fire-fighting equipment; sales of building decoration materials; sales of building waterproofing membrane products; road freight transport of general goods with a total mass of 4.5 tons or less (excluding network freight and dangerous goods); sales of non-metallic mineral products; sales of metal materials; sales of metal ores; sales of building materials; sales of coatings (excluding hazardous chemicals); sales of labor protection supplies; sales of lubricating oil; wholesale of automotive parts; retail of automotive parts; sales of coal and its products; residential water and electricity installation and maintenance services.