STRUKTURA PIOTR KAJAK

71.11.Z - Architectural activities

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

42.91.Z - Works related to the construction of water engineering objects

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

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

50.30.Z - Inland waterway passenger transport

50.40.Z - Inland water transport of goods

69.20.Z - Accounting, bookkeeping and tax consultancy

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

72.19.Z - Scientific research and development activities

79.12.Z - Tour operator activities

79.90.A - Other reservation services and related activities