Engineering and design of offshore facilities, oil and gas platforms, buildings, marine construction, pier construction, pipeline construction, steel structure construction works, underwater building and construction, floating facilities, refineries for oil, gas and other energy-products, vessels, boats, ships, tugboats, fishing boats, dragging boats, dry docks, and dry dock facilities, wharfs, quays, panellings, dams, piers, bridges, offshore platforms, platforms for research and production of oil, light towers and light houses, platforms for sulfur mining, docking and mooring places, loading docks, power installations and industrial installations and factories; design of apparatus and installations for offshore locations on and under water for use in offshore oil and gas exploration, drilling, pumping, transporting and refining; design of apparatus and installations for ships and floating offshore equipment for use in use in offshore oil and gas exploration, drilling, pumping, transporting and refining; design of apparatus and installations for pipelines, steel constructions, namely, offshore facilities, oil and gas platforms, buildings, marine construction, pier construction, pipeline construction, steel structure construction works, underwater building and construction, floating facilities, refineries for oil, gas and other energy products, vessels, boats, ships, tugboats, fishing boats, dragging boats, dry docks, and dry dock facilities, wharfs, quays, panellings, dams, piers, bridges, offshore platforms, platforms for research and production of oil, light towers and light houses, platforms for sulfur mining, docking and mooring places, loading docks, power installations and industrial installations and factories; design of apparatus and installations for industrial installations, namely, industrial installations for oil and gas exploration, drilling, pumping, transporting and refining; design of offshore oil and gas exploration, drilling, pumping, transporting and refining apparatus and machines for use in offshore oil and gas exploration, drilling, pumping, transporting and refining; scientific and industrial research and technical studies; technical design of offshore facilities, oil and gas platforms, buildings, marine construction, pier construction, pipeline construction, steel structure construction works, underwater building and construction, floating facilities, refineries for oil, gas and other energy products, vessels, boats, ships, tugboats, fishing boats, dragging boats, dry docks and dry dock facilities, wharfs, quays, panellings, dams, piers, bridges, offshore platforms, platforms for research and production of oil, light towers and light houses, platforms for sulfur mining, docking and mooring places, loading docks, power installations and industrial installations and factories; quality control services in the fields of construction, repair and maintenance of equipment in use for oil and gas exploration, drilling, pumping, transporting and refining; quality control services in the fields of transportation, storage, research and extraction of oil, gas and other energy products