Jan Marjanowski 'PRZEDSIĘBIORSTWO MARCOR'

36.00.Z - Extraction, treatment, and supply of water

20.59.Z - Manufacture of other chemical products, not elsewhere classified

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

28.29.Z - Manufacture of other general-purpose machinery not elsewhere classified

33.11.Z - Repair and maintenance of metal products

33.12.Z - Repair and maintenance of machinery

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

41.20.Z - Construction work related to the construction of residential and non-residential buildings

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

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

46.69.Z - Wholesale trade

46.75.Z - Wholesale trade

49.41.Z - Road freight transport

58.11.Z - Publishing of books

58.19.Z - Other publishing activities, excluding software publishing

71.12.Z - Engineering activities and related technical consultancy

71.20.B - Inspection and issuing opinions on the technical condition of chimneys and ventilation ducts

72.11.Z - Scientific research and development activities

72.19.Z - Scientific research and development activities

74.10.Z - Specialized design activities

74.20.Z - Photographic activities

74.90.Z - Other professional, scientific and technical activities, not elsewhere classified

85.59.B - Courses and training for acquiring knowledge, skills, and professional qualifications in non-school forms

85.60.Z - Educational support activities