POLSKIE TOWARZYSTWO ENERGETYKI CIEPLNEJ

94.11.Z - Activities of commercial organizations and employers' organizations

18.20.Z - Reproduction of recorded media

58.11.Z - Publishing of books

70.22.Z - Head office activities and management 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

72.20.Z - Scientific research and development in social sciences and humanities

73.20.Z - Market research and public opinion polling

82.30.Z - Activities related to organizing fairs, exhibitions, and congresses

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