ZK Instal Zbigniew Kowalczuk

28.99.Z - Manufacture of other special-purpose machinery not elsewhere classified

16.23.Z - Production of other carpentry and joinery products for construction

22.26.Z - Manufacture of other plastic products

32.99.Z - Production of other products not classified elsewhere

33.12.Z - Repair and maintenance of machinery

33.14.Z - Repair and maintenance of electrical devices

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

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

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

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

43.23.Z - Installation of insulation

43.24.Z - Installation of other building systems

43.34.Z - Painting and glazing

43.35.Z - Performing other finishing construction works

43.41.Z - Performing roof structures and coverings

46.64.Z - Wholesale trade of other machines and devices

64.19.Z - Other monetary intermediation

68.12.C - Development of building projects

71.11.Z - Architectural activities

71.12.B - Engineering activities and related technical consultancy

82.91.Z - Activities of collection agencies and credit bureaus