Building of transport and distribution lines for electricity
Building of lines and networks of telecommunication
Terracing work: digging, grading of construction sites, opening of trenches, removal of rocks, destruction with explosives, etc.
Preparation of sites for mining: overburden removal and other work of planning and preparation for mining sites
Ground-water lowering and dredging of construction sites
Dredging of agricultural and silvicultural lands
Removal on construction sites
Installation in buildings or in other projects of building of: pumbling systems and hygiene appliances, pipes for gas and water (except for heating), setting of automatic extinguishers, etc.
Construction of distribution facilities for water and gas
Construction of civil-technical works for electricity and telecommunications
Preparing land for construction
Electro-technical installation works at buildings
Electro-technical installation works, with the exception of those executed at buildings
Plumbing works
Installation of heating, air-conditioning and ventilation
Wholesale in electronic devices and communication devices as well as parts thereof