Telecommunication Facilities / Network Construction, Burglar Alarm Installation, Video Surveillance, Fire Alarm Installation, Access Control Systems, Intercom Systems / Local Networks

Heating Systems Installation, Ventilation Systems Installation, Air-Conditioning Installation, Refrigeration Installation, Water Supply / Sewage Work - Indoor / Plumbing, Pumping Station Construction, Water Treatment, Electrical Work / Indoor, Lighting Systems, Renewable Energy Supply / Installations, Burglar Alarm Installation, Fire Alarm Installation, Fire Suppression Installation, Access Control Systems, Smart House Systems, 01.06. HVAC / Gas Supply, Category 1 (01.06), 01.08. Water Supply and Drainage / Melioration Systems, Category 1 (01.08), 03.06. HVAC / Gas Supply, Category 1 (03.06), 03.08. Water Supply and Drainage / Melioration Systems, Category 1 (03.08)

Commercial Construction, Industrial Construction, Greenhouse Construction, Steel Building Construction, Metal Work, Smithery / Metal Art, Electric Welding, Metal Laser Cutting, Artistic Metal Works, 03.04. Residential / Commercial and Industrial Buildings, Category 1 (03.04)