6
Building components, shaped parts and profile parts of metal, and sheets and plates of metal in the form of crash barriers, curbs, crash walls, skid barriers, guard walls, noise protection embankments and sight-screen walls for roads; building parts, shaped parts and profile parts of metal for crash barriers, crash walls and skid barriers, guard walls, noise protection embankments and sight-screen walls for roads; road signs and panels, non-luminous and non-mechanical, of metal, for roads; bollards of metal; road barriers of metal; marker road studs and marker knobs of steel for marking carriageways
19
Building components, shaped parts and profile parts (non-metallic), in the form of crash barriers, curbs, crash walls, skid barriers, guard walls, noise protection embankments and sight-screen walls for roads, in particular of concrete; building components, shaped components and profile components (non-metallic) for crash barriers, crash walls, skid barriers, guard walls, noise protection embankments and sight-screen walls for roads, in particular of concrete; road signs and panels, non-luminous and non-mechanical, not of metal; bollards, not of metal; road barriers, not of metal; guide cones, not of metal; glass granules for marking roads; road marking sheets and strips of synthetic material; marker road studs and marker knobs of plastic for marking carriageways
37
installation, repair and maintenance of crash barriers, curbs, crash walls, skid barriers, guard walls, noise protection embankments and sight-screen walls for roads, road signs and panels, bollards and road barriers; road marking work, work to remove road markings