"Pro Inspection Service Hoai Dung Andrzej Prokowski"

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

71.12.Z - Engineering activities and related technical consultancy

71.20.B - Other technical testing and analysis

72.19.Z - Other research and experimental development on natural sciences and engineering

85.59.A - Teaching of foreign languages

85.59.B - Other out-of-school forms of education, not elsewhere classified