6
Metal casting forms for concrete, Casting forms of metal for production of tunnel extension segments
17
Joint packings, Sealing preparations and Stopping devices; Insulating materials and articles; Gaskets for tunnel lining segments, Watertight seals for tunnel extension segments, gas-tight seals for tunnel extension segments, fire-retardant seals for tunnel extension segments; Watertight linings for tunnels, not of metal, gas-tight linings for tunnels, not of metal, fire-resistant linings for tunnels, not of metal, fire-retardant linings for tunnels, not of metal; Pipe linings, not of metal, watertight pipe linings, not of metal, gas-tight pipe linings, not of metal, fire-resistant pipe linings, not of metal, fire-retardant pipe linings, not of metal
19
Building materials and components, not of metal, circular rings of reinforced concrete, sections of circular rings of reinforced concrete for lining tunnels of all kinds; tunnel lining segments; Linings, non metallic; fire protection elements; Fire protection materials (Non-metallic -) for use in building
37
Tunnelling; Tunnels (Drilling of -); Lining of tunnels; Installation of linings in tunnels, installation of watertight linings in tunnels, installation of gas-tight linings in tunnels, installation of fire-resistant linings in tunnels, installation of fire-retardant linings in tunnels; Installation of linings in tunnel segments, installation of watertight linings in tunnel segments, installation of gas-tight linings in tunnel segments, installation of fire-resistant linings in tunnel segments, installation of fire-retardant linings in tunnel segments; Installation of tubular linings in tunnels; Installation of fire-retardant coatings in tunnels, installation of sealing coatings in tunnels