Construction; construction information; building construction supervision; factory construction; pipeline construction and maintenance; warehouse construction and repair; repair information; shipbuilding; underwater construction; underwater repair; mining extraction; machinery installation, maintenance and repair; vehicle lubrication; vehicle maintenance; motor vehicle maintenance and repair; vehicle service stations including refuelling and maintenance; fuel filling; drilling of wells

Analysis for oil-field exploitation; oil-field surveys; oil prospecting; geological prospecting; oil-well testing; support to the exploitation, perforation, production of oil and gas