Main prod. Group survey
deu
fra
esp
12
Railway engineering
Railway engineering
Planning and construction services, railway specific
1111.11
Projecting, planning and realisation of railway installations
1111.14
Railway traffic system planning (railway stations, crossings and junctions)
1111.17
Planning of new stretches of railway and track systems
1111.31
Railway construction
1111.34
Railway construction
1111.35
Rail track sanitation
