KONIECZNY KRZYSZTOF KONIAK

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

25.51.Z - Coating of metals

25.52.Z - Heat treatment of metals

25.53.Z - Mechanical processing of metal parts

33.12.Z - Repair and maintenance of machinery

33.19.Z - Repair and maintenance of other equipment and installations

42.12.Z - Works related to the construction of railways and underground railways

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

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

43.21.Z - Installation of electrical systems

43.24.Z - Installation of other building systems

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