6
Silos, vats and tanks of metal; Metallic containers; Water tanks of metal; Frames of metal for building; Reservoirs (metal -) [structures]; Structures of metal; Grids of metal; Tile floorings of metal; Floor panels and grilles of metal; Metal floors; Uprights of metal; Modular shelters of metal; Tanks and containers of metal; Pipes and tubes of metal; Metal lids; Ironmongery, small items of metal hardware; Staircases of metal; Metal railings
19
Silos, vats and tanks not of metal; water reservoirs (non-metallic); Frames, not of metal, for building; Storage tanks [structures], not of metal; Non-metallic structures; Gratings (Non-metallic -); Panels and grills not of metal for floors; Floors, not of metal; Modular shelters (Non-metallic -); Non-metallic pipes; Manholes not of metal; Staircases, not of metal; Settlement tanks, not of metal
20
Silos, vats, tanks and containers not of metal (storage, transport); Silos, vats, tanks and containers of concrete; Containers, not of metal [storage, transport]; Tanks and containers, not of metal; Locks and small items of hardware not of metal
37
Building, repair and maintenance of silos, vats, tanks and containers; Civil engineering relating to the installation of silos, vats and tanks
42
Conducting and studying research and technical projects; Technical project planning; Engineering services; Conducting engineering surveys; Technical design and technical project management for the development of composite material parts