Maciej Marek

24.20.Z - Production of pipes, tubes, closed profiles, and fittings from steel

25.11.Z - Production of metal constructions and their parts

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

25.30.Z - Manufacture of weapons and ammunition

25.61.Z - Production of cutlery and knives

25.62.Z - Production of locks and hinges

25.92.Z - Production of packaging from non-ferrous metals

28.93.Z - Manufacture of machinery used in food processing, tobacco processing, and beverage production

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

43.39.Z - Specialized construction works

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