| 83351 | Technical inspection services during the construction of agricultural buildings | |
| 83352 | Technical inspection services during the construction of airfield runways | |
| 83352 | Technical inspection services during the construction of bridges | |
| 83353 | Technical inspection services during the construction of chemical and related facilities | |
| 83352 | Technical inspection services during the construction of civil engineering works | |
| 83351 | Technical inspection services during the construction of commercial buildings | |
| 83352 | Technical inspection services during the construction of dams | |
| 83352 | Technical inspection services during the construction of elevated highways | |
| 83352 | Technical inspection services during the construction of harbours | |
| 83352 | Technical inspection services during the construction of highways | |
| 83351 | Technical inspection services during the construction of industrial buildings | |
| 83353 | Technical inspection services during the construction of industrial plants and processes | |
| 83352 | Technical inspection services during the construction of irrigation works | |
| 83352 | Technical inspection services during the construction of local cables and related works | |
| 83352 | Technical inspection services during the construction of local pipelines and related works | |
| 83352 | Technical inspection services during the construction of long-distance communication lines | |
| 83352 | Technical inspection services during the construction of long-distance pipelines | |
| 83352 | Technical inspection services during the construction of long-distance power lines (cables) | |
| 83353 | Technical inspection services during the construction of manufacturing constructions | |
| 83353 | Technical inspection services during the construction of mining constructions | |
| 83351 | Technical inspection services during the construction of non-residential buildings | |
| 83352 | Technical inspection services during the construction of outdoor recreation facilities | |
| 83352 | Technical inspection services during the construction of outdoor sport facilities | |
| 83353 | Technical inspection services during the construction of power plants | |
| 83352 | Technical inspection services during the construction of railways | |
| 83351 | Technical inspection services during the construction of residential buildings | |
| 83352 | Technical inspection services during the construction of roads | |
| 83352 | Technical inspection services during the construction of streets | |
| 83352 | Technical inspection services during the construction of subways | |
| 83359 | Technical inspection services during the construction of traffic control systems | |
| 83352 | Technical inspection services during the construction of tunnels | |
| 83352 | Technical inspection services during the construction of waterways | |
| 83352 | Technical inspection services during the construction of waterworks | |
| 83564 | Technical inspection services of road transport vehicles | |
| 83569 | Technical testing and analysis services, other | |
| 83569 | Technical testing and analysis that does not alter the test object | |
| 83139 | Technicians, consulting, services of | |
| 81140 | Techniques, agricultural, research and experimental development concerning | |
| 81130 | Technology, research and experimental development concerning | |
| 44130 | Tedders, hay | |