6
Common metals and their alloys; Buildings, transportable, of metal; Tubes of metal; Metal building materials, in particular sliding bearings, including for civil engineering structures and bridge building; Building materials of metal; Securing devices of metal (building science); Buildings of metal; Metal railings for bridges; Building and construction materials and elements of metal; Building materials of metal; Earthquake-proof devices of metal
17
Plastics in extruded form for use in manufacture, in particular for use as sliding materials or as parts of sliding bearings; Packing and insulating materials; Insulation for building purposes; Vibration dampers; Vibration dampers of rubber
19
Anti-friction bearings not of metal for building; Building materials, not of metal; Rigid pipes, not of metal, for building; Non-metallic transportable structures; Non-metallic building materials, In particular sliding bearings, including for civil engineering structures and bridge construction; Sliding elements, not of metal, namely slide bearings, discs or plates; Buildings, not of metal; Structures, not of metal, for bridges; Securing devices, not of metal (building science); Bridge bearings [construction materials] not of metal; Stanchion stays (Non-metallic -); Bearings of plastic for seismic isolation of buildings; Expanded plastics for use in construction; Structural elements (Non-metallic -) for use in building