Tomasz Kawczyński DIEN-KAT

42.11.Z - Works related to the construction of roads and highways

25.40.Z - Forging, pressing, stamping, and powder metallurgy

25.51.Z - Coating of metals

25.52.Z - Heat treatment of metals

25.53.Z - Mechanical processing of metal parts

42.13.Z - Works related to the construction of bridges and tunnels

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

43.21.Z - Installation of electrical systems

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

43.23.Z - Installation of insulation

43.24.Z - Installation of other building systems

43.31.Z - Plastering

43.32.Z - Installation of building carpentry

43.34.Z - Painting and glazing

43.35.Z - Performing other finishing construction works

43.41.Z - Performing roof structures and coverings

43.42.Z - Performing other specialized construction works related to the construction of buildings

43.50.Z - Specialized construction works in the field of civil and water engineering

43.91.Z - Masonry works

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

81.22.B - Other cleaning of buildings and industrial premises, not elsewhere classified

81.23.B - Other cleaning services, not elsewhere classified

81.30.Z - Landscaping services