| 42120 | Cable supported transport systems construction |
| 42120 | Construction of underground railways |
| 42120 | Railway construction |
| 42120 | Railway tunnel construction |
| 42120 | Railway tunnelling contractor |
| 42120 | Subway construction |
| 42120 | Supply line (third rail) for railway construction |
| 42120 | Tramways construction |
| 42120 | Transmission line construction |
| 42120 | |