| 83333 | Undertaking project impact studies of manufacturing constructions | |
| 83333 | Undertaking project impact studies of mining constructions | |
| 83331 | Undertaking project impact studies of non-residential buildings | |
| 83339 | Undertaking project impact studies of other construction projects | |
| 83332 | Undertaking project impact studies of outdoor recreation facilities | |
| 83332 | Undertaking project impact studies of outdoor sports facilities | |
| 83333 | Undertaking project impact studies of power plants | |
| 83332 | Undertaking project impact studies of railways | |
| 83331 | Undertaking project impact studies of residential buildings | |
| 83332 | Undertaking project impact studies of roads | |
| 83332 | Undertaking project impact studies of streets | |
| 83332 | Undertaking project impact studies of subways | |
| 83333 | Undertaking project impact studies of the automation of industrial processes | |
| 83339 | Undertaking project impact studies of traffic control systems | |
| 83332 | Undertaking project impact studies of tunnels | |
| 83332 | Undertaking project impact studies of waterways | |
| 83332 | Undertaking project impact studies of waterworks | |
| 97320 | Undertaking services | |
| 83331 | Undertaking technical feasibility studies of agricultural buildings | |
| 83332 | Undertaking technical feasibility studies of airfield runways | |
| 83332 | Undertaking technical feasibility studies of bridges | |
| 83333 | Undertaking technical feasibility studies of chemical and related facilities | |
| 83332 | Undertaking technical feasibility studies of civil engineering works | |
| 83331 | Undertaking technical feasibility studies of commercial buildings | |
| 83332 | Undertaking technical feasibility studies of dams | |
| 83332 | Undertaking technical feasibility studies of elevated highways | |
| 83332 | Undertaking technical feasibility studies of harbours | |
| 83332 | Undertaking technical feasibility studies of highways | |
| 83331 | Undertaking technical feasibility studies of industrial buildings | |
| 83333 | Undertaking technical feasibility studies of industrial plants and processes | |
| 83332 | Undertaking technical feasibility studies of irrigation works | |
| 83332 | Undertaking technical feasibility studies of local cables and related works | |
| 83332 | Undertaking technical feasibility studies of local pipelines and related works | |
| 83332 | Undertaking technical feasibility studies of long-distance communication lines | |
| 83332 | Undertaking technical feasibility studies of long-distance pipelines | |
| 83332 | Undertaking technical feasibility studies of long-distance power lines (cables) | |
| 83333 | Undertaking technical feasibility studies of manufacturing constructions | |
| 83333 | Undertaking technical feasibility studies of mining constructions | |
| 83331 | Undertaking technical feasibility studies of non-residential buildings | |
| 83332 | Undertaking technical feasibility studies of outdoor recreation facilities | |