93010 | Civil engineering in general |
93020 | Earthworks. Excavations. Foundation construction. Underground works |
93025 | External water conveyance systems |
93030 | External sewage systems |
93040 | Bridge construction |
93060 | Tunnel construction |
93080 | Road engineering |
93100 | Construction of railways |
93110 | Construction of ropeway |
93120 | Construction of airports |
93140 | Construction of waterways , ports and dykes |
93160 | Hydraulic construction |