Installation of secondary power supply systems (electrical generators)
Building of tunnels for roads and railways and other underpasses
Setting of monitoring systems and alarms against housebreakings
Installation in buildings or in other projects of building of: heating, cooling and ventilation systems (except heating)
Implementation in buildings or in other projects of building of: thermal insulation materials, acoustic and antivibrating insulation materials
Work of insulation of pipes for heating or cooling
Work of insulation of coolers or refrigerated warehouses
Building of coolers, vaults, etc.
Trade intermediaries for electric and electronic equipments, including installation equipments for industrial use
Trade intermediaries for diverse products
Design and realization of projects interesting electric and electronic engineering, mining, chemical and industrial engineering, the engineering of systems, security technics, etc.
Development of projects requiring acoustic engineering, technics of air-conditioning, cooling, refrigeration, sanitation and fight against pollution, etc.
Test and analyses on texture, physical characteristics, performances, compliance with reglements and standards or specifications of materials, products, installations, etc.
Measurements concerning clean air and water, measurement of radioactivity or similar phenomenons, analysis of the potential sources of pollution (smoke, sewage, etc.)
Development of advertising products
Electro-technical installation works, with the exception of those executed at buildings
Installation of heating, air-conditioning and ventilation
Other types of building installations
Other types of technical surveys and checks
Other types of technical and scientific activities
Copying, preparing of documents and other related ancillary activities for office firms
Other types of business services
Vocational training
Other types of education
Other personal services
Organisation of congresses and fairs
Various administrative services for offices
Engineers and similar technical advisors, with the exception of surveyors