Bogumiła Kowalczyk

43.22.Z - Installation of plumbing, heating, and air-conditioning systems

25.21.Z - Production of central heating radiators, steam generators, and boilers

33.11.Z - Repair and maintenance of metal products

33.20.Z - Installation of industrial machinery, equipment, and devices

42.21.Z - Works related to the construction of transmission pipelines and distribution networks

42.99.Z - Works related to the construction of other civil engineering and water engineering objects, not classified elsewhere

43.11.Z - Demolition and destruction of buildings

43.12.Z - Site preparation for construction

43.13.Z - Performing excavations and geological-engineering drilling

43.31.Z - Plastering

43.32.Z - Installation of building carpentry

43.33.Z - Flooring, wallpapering, and cladding of walls

43.34.Z - Painting and glazing

43.91.Z - Masonry works

43.99.Z - Other specialized construction works, not classified elsewhere