Construction services, namely, road and highway construction, subway construction, river banking, pipeline construction, pipeline installation, pipeline maintenance, thermal power plant construction, apartment construction, commercial building construction, construction of power generation plants, construction of industrial plants, factory construction services, asphalting, air conditioning apparatus installation and repair

Cast steel in bar, rod, or wire form for further manufacture; metal chill molds for use in manufacture and construction; metal silos; and metal fittings for compressed air ducts; metal storage tanks, sold empty; metal pressure water tanks

CONSTRUCTION DRAFTING, ENGINEERING DRAWING SERVICES, ENGINEERING, TECHNICAL RESEARCH, MECHANICAL RESEARCH

Filtering units for household use; ionization machines for treatment of air in manufacturing; air-purifying units for use in manufacturing; dust-removing machines for industrial use; electric dust-removing machines for manufacturing; chimney flue; gas-powered furnace boilers; steam generators; heaters for use in manufacturing; air conditioning evaporators; air conditioning condensers; air filtering machines; incinerators; nuclear reactors; reactors in nuclear steam supply system; water-refini...

Pneumatic tube conveyors, oil derricks, conveyor belts made of wire, loading and unloading machines for use in manufacture and construction, windlasses, cranes, rail hopper unloading machines, hoists, separating machines for use in manufacture and construction, milling machines, steam turbines, hydraulic turbines, electric generators, and water intake pumps