Installation of secondary power supply systems (electrical generators)
Building of transport and distribution lines for electricity
Terracing work: digging, grading of construction sites, opening of trenches, removal of rocks, destruction with explosives, etc.
Setting of electric cables and appliances
Setting of monitoring systems and alarms against housebreakings
Setting of lighting and signalling systems for roads, railroads, port and airport installations (including the setting of notice boards)
Setting of electrical installations of heating
Cleaning of new buildings and restoring after works
Making of repointing works
Assembling of elements of metallic structures, not made by the unit making the works
Assembling and disassembling of scaffoldings and work platforms
Wholesale trade of motorcyles, new or used
Wholesale trade of cyclomotors, new or used
Wholesale trade of pieces and accessories for motorcycles
Creation and setting of advertisements: posters, advertising signs, lighting newspapers, lighting signs, display on buses, etc.
Inside cleaning of all kind of buildings: offices, industries, institutional premises and other premises for professional or trade use, apartment buildings, etc
Window cleaning
Chimney sweeping and cleaning of hearths, ovens, incinerators, boilers, air ducts and smoke removal appliances
Design and maintenance of gardens, parks and green places for sport facilities
Organization and management of sport clubs: football, cycling, bowling alleys, swimming, golf, boxing, wrestling and other martial arts, fitness clubs, winter sport associations, etc.
Repair of electronic devices
Insulation works
Other types of building installations
Interior architects
Installation of industrial machines, devices and equipment
Construction of civil-technical works for electricity and telecommunications
Electro-technical installation works at buildings
Electro-technical installation works, with the exception of those executed at buildings
Installation of heating, air-conditioning and ventilation