Mechanical Work
- Oil, Gas and Energy Piping Construction
- Engineering Work Including Maintenance. Oil, Gas and Energy Pipe Construction, technical works Include Maintenance
- Oil and Gas Production, Storage Facilities Engineering Works Including Maintenance Production Facilities, Oil and gas Storage technical works Include Maintenance
- Thermal, pressurized, oil, gas, geothermal installations Works Engineering Including Treatment. Thermal Installation, pressure, oil, geothermal gas technical works, Include Maintenance