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A. Świerczyńska
Gdańsk University of Technology, Mechanical Faculty, 80-233 Gdańsk, Narutowicza 11/12 Poland,
J. Łabanowski
Gdańsk University of Technology, Mechanical Faculty, 80-233 Gdańsk, Narutowicza 11/12 Poland,
D. Fydrych
Gdańsk University of Technology, Mechanical Faculty, 80-233 Gdańsk, Narutowicza 11/12 Poland,