This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.
Bogdan Ligaj
Assoc. Prof., University of Technology and Science in Bydgoszcz, Poland
Robert Sołtysiak
Ph.D., University of Technology and Science in Bydgoszcz, Faculty of Mechanical Engineering Department of Mechanics and Machine Design 7 Prof. S. Kaliski Street 85-796 Bydgoszcz Poland, phone: (+48) 52 340 82 53 (+48) 52 340 82 78