6
Metal building materials; transportable buildings of metal; metal floating roofs and metal covers for liquid storage tanks; floating roof seals for liquid storage tanks; roof drains for aboveground storage tanks; parts and fittings for all the aforesaid
7
Machine tools; mixing and blending machines for aboveground storage tanks; parts and fittings for all the aforesaid
37
Building construction; industrial and commercial construction; construction, installation, repair, cleaning, restoration and maintenance of storage tanks, storage tank terminals, storage spheres, storage facilities, specialty vessels, liquefied natural gas tanks, cryogenic tanks, industrial plants, chemical plants, nuclear plants, mineral processing plants; construction, installation, repair, cleaning, restoration and maintenance of electrical power substations and steam power substations, power generating facilities, refineries, energy generation and storage systems, wind turbines, pipelines, mines, equipment, electrical systems, alternative energy systems, solar energy based power plants, renewable energy systems, photovoltaic installations; electrical contracting; electrical contractor services; installation of electrical and generating machinery; construction project management services; electrical power transmission line construction, repair, maintenance and installation of telecommunication wiring, switches and cabling; installation of heating, cooling, and environmental control systems; construction, repair and maintenance of mining machines, energy generation equipment support structures, and ancillary structures for supporting meteorological data gathering equipment; advice, information and consultancy services relating to all of the foregoing