Building materials, not of metal; asphalt, pitch and bitumen; non-metallic transportable buildings
Nonmetallic Building MaterialsScaffolding; dredging; digging foundations; repair and maintenance of constructions; assembly, maintenance and repair of heating, ventilating and refrigerating installations as well as industrial installations and machinery; installation works, installation of water distribution installations; repair and maintenance of machinery; works involving the use of explosives; rental of construction machinery and tools
Building Construction and RepairConstruction drafting and consultancy; services of architects, chemists, physicists, engineers and land surveyors; computer programming; expert evaluations carried out by engineers or in a laboratory; technical consultancy services; rental of data processing equipment; material testing
Computer and Scientific