| 83327 | Technical inspection services during the construction of local water pipelines and related works | |
| 83325 | Technical inspection services during the construction of long-distance communication lines | |
| 83323 | Technical inspection services during the construction of long-distance oil or gas pipelines | |
| 83324 | Technical inspection services during the construction of long-distance power lines (cables) | |
| 83327 | Technical inspection services during the construction of long-distance water pipelines | |
| 83322 | Technical inspection services during the construction of manufacturing constructions | |
| 83322 | Technical inspection services during the construction of mining constructions | |
| 83321 | Technical inspection services during the construction of non-residential buildings | |
| 83329 | Technical inspection services during the construction of outdoor recreation facilities | |
| 83329 | Technical inspection services during the construction of outdoor sport facilities | |
| 83324 | Technical inspection services during the construction of power plants | |
| 83323 | Technical inspection services during the construction of railways | |
| 83321 | Technical inspection services during the construction of residential buildings | |
| 83323 | Technical inspection services during the construction of roads | |
| 83323 | Technical inspection services during the construction of streets | |
| 83323 | Technical inspection services during the construction of subways | |
| 83323 | Technical inspection services during the construction of tunnels | |
| 83323 | Technical inspection services during the construction of waterways | |
| 83327 | Technical inspection services during the construction of waterworks | |
| 83329 | Technical inspection services during the execution of natural gas or steam distribution projects | |
| 83329 | Technical inspection services during the execution of outdoor sport and recreation facilities | |
| 83324 | Technical inspection services during the execution of power projects | |
| 83325 | Technical inspection services during the execution of telecommunications and broadcasting projects | |
| 83323 | Technical inspection services during the execution of transportation projects | |
| 83326 | Technical inspection services during the execution of waste management projects | |
| 83327 | Technical inspection services during the execution of water, sewage and drainage projects | |
| 83444 | Technical inspection services of road transport vehicles | |
| 83449 | Technical testing and analysis services, other | |
| 83449 | Technical testing and analysis that does not alter the test object | |
| 83939 | Technicians, consulting, services of | |
| 81140 | Techniques, agricultural, research and experimental development concerning | |
| 81129 | Technology, research and experimental development concerning | |
| 44124 | Tedders, hay | |
| 46940 | Tee joints, of base metal coated or lined with insulating material, not fitted with terminals, for electrical conduit tubing | |
| 41292 | Tee joints, of cast iron, for tubes or pipes (excl. insulated electrical joints) | |
| 41293 | Tee joints, of iron or steel (excl. cast iron and steel), for tubes or pipes (excl. insulated electrical joints) | |
| 41293 | Tee joints, of stainless steel, for tubes or pipes (excl. insulated electrical joints) | |
| 38440 | Tees, golf | |
| 38440 | Teeters, playground | |
| 44115 | Teeth (rigid or springy) for scarifying, cultivating or weeding machines | |