Drilling, turning, countersinking, shaving, planing, lapping, broach, dressing, sawing, grinding, sharpening, etc. of metallic pieces
Development, assembling and maintenance of automatic production units, including several machines, handling equipments and appliances for centralized control
Installation of secondary power supply systems (electrical generators)
Real estate development of residential buildings
Making of carcass of buildings
Destruction of buildings and other kind of buildings
Setting of electric cables and appliances
Setting of telecommunication systems and computer installations
Setting of monitoring systems and alarms against housebreakings
Setting of electrical installations of heating
Technical drawing
Working by stock removal of metals
Construction of residential buildings
Electro-technical installation works at buildings
Electro-technical installation works, with the exception of those executed at buildings
Plumbing works
Insulation works
Carpentry
Activities by industrial designers
Activities by graphical designers
Installation of heating, air-conditioning and ventilation