6
Drainpipes and drainage systems mainly consisting therefrom and drainage installations mainly consisting of tubes and pipes, All the aforementioned goods being of metal; Valves, Gate valves, Non-return valves, Pressure valves, of metal, for use in the following fields: Drainage systems and drainage installations; Shaft systems mainly consisting of pipes, collection containers, couplings and junctions, of metal, Especially Collection shafts for drainage systems and drainage installations
11
Taps and fittings, Regulating equipment, for use in the following fields: Drainage systems and drainage installations
19
Drainpipes and drainage systems mainly consisting therefrom and drainage installations mainly consisting of tubes and pipes, all the aforesaid goods of metal; Shaft systems mainly consisting of pipes, collection containers, couplings and junctions, not of metal, Especially Collection shafts for drainage systems and drainage installations
20
Valves, Sliding valves, Non-return valves, Pressure valves, All not of metal, for use in the following fields: Drainage systems and drainage installations
37
Conducting of shaft drilling, Drilling for wells; Conducting of construction and installation work for the creation of drainage installations; Laying of drainpipes; Maintenance and Maintainance services in relation to the following fields: Drainage systems and Drainage installations
42
Technical planning, Relating to the following sectors: Drilling of wells; Technical planning, Relating to the following sectors: Drainage installations