| 83563 | Integrated electrical systems, testing and analysis of | |
| 83313 | Integrated engineering design for manufacturing constructions | |
| 83311 | Integrated engineering services for buildings | |
| 83312 | Integrated engineering services for civil engineering works | |
| 83313 | Integrated engineering services for industrial plant and processes | |
| 83313 | Integrated engineering services for mining constructions | |
| 83319 | Integrated engineering services for other construction projects | |
| 83319 | Integrated engineering services for other projects | |
| 83313 | Integrated engineering services for the automation of industrial processes | |
| 83311 | Integrated engineering services for the construction of agricultural buildings | |
| 83312 | Integrated engineering services for the construction of airfield runways | |
| 83312 | Integrated engineering services for the construction of bridges | |
| 83313 | Integrated engineering services for the construction of chemical and related facilities | |
| 83312 | Integrated engineering services for the construction of civil engineering works | |
| 83311 | Integrated engineering services for the construction of commercial buildings | |
| 83312 | Integrated engineering services for the construction of dams | |
| 83312 | Integrated engineering services for the construction of elevated highways | |
| 83312 | Integrated engineering services for the construction of harbours | |
| 83312 | Integrated engineering services for the construction of highways | |
| 83311 | Integrated engineering services for the construction of industrial buildings | |
| 83313 | Integrated engineering services for the construction of industrial plant and processes | |
| 83312 | Integrated engineering services for the construction of irrigation works | |
| 83312 | Integrated engineering services for the construction of local cables and related works | |
| 83312 | Integrated engineering services for the construction of local pipelines and related works | |
| 83312 | Integrated engineering services for the construction of long-distance communication lines | |
| 83312 | Integrated engineering services for the construction of long-distance pipelines | |
| 83311 | Integrated engineering services for the construction of non-residential buildings | |
| 83312 | Integrated engineering services for the construction of outdoor recreation facilities | |
| 83312 | Integrated engineering services for the construction of outdoor sports facilities | |
| 83313 | Integrated engineering services for the construction of power plants | |
| 83312 | Integrated engineering services for the construction of railways | |
| 83311 | Integrated engineering services for the construction of residential buildings | |
| 83312 | Integrated engineering services for the construction of roads | |
| 83312 | Integrated engineering services for the construction of streets | |
| 83312 | Integrated engineering services for the construction of subways | |
| 83312 | Integrated engineering services for the construction of the construction of long-distance power lines (cables) | |
| 83319 | Integrated engineering services for the construction of traffic control systems | |
| 83312 | Integrated engineering services for the construction of tunnels | |
| 83312 | Integrated engineering services for the construction of waterways | |
| 83312 | Integrated engineering services for the construction of waterworks | |