Engineers and similar technical advisors, with the exception of surveyors
Study, development of the production of active principles for drug manufacture
Manufacture of other electrical appliances for acoustic or visual signs: ringings, sirens, indicating boards, monitrons for protection against theft and fire
Installation of secondary power supply systems (electrical generators)
Setting of monitoring systems and alarms against housebreakings
Wholesale in computers and their peripheral devices, as well as software
Running of call centres for taxis
Fill-in of tax returns for individuals and companies
Electro-technical installation works at buildings
Plumbing works
Laying of floor and wall tiles
Other types of building installations
Installation of heating, air-conditioning and ventilation