Krzysztof Smela

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

33.12.Z - Repair and maintenance of machinery

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

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

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

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