Setting in buildings or other projects of building of: wall recoverings or tiles in ceramic, in concrete or in freestones; floorings and wall recovering in granites, etc.
Construction of bridges and tunnels
Manufacture of polymers, including acrylic polymers and polymers of ethylene, propylene, styrene, vinyl chloride and vinyl acetate
Laying of floor and wall tiles
Other types of works with regard to the completion of buildings
Wholesale in floor and wall tiles
Retail trade in floor and wall-tiles in specialised shops