1. Department of Mechanics and Machine Design, Faculty of Mechanical Engineering, Opole University of Technology, Mikołajczyka 5, 45-271 Opole, Poland
2. Regional Technological Institute, Faculty of Mechanical Engineering, University of West Bohemia, Univerzitní 8, 301 00 Plzeň, Czech Republic
3. Research and Testing Institute in Plzeň, Tylova 1581/46, 301 00 Plzeň, Czech Republic