Tribological checks were completed employing a ball-on-disc T-eleven tester. The balls have been made from metal, Whilst the discs have been made of metal, aluminium oxide, zirconium oxide, polyamide and poly(methyl methacrylate). The outline in the gadget plus the strategies has long been supplied in the literature (Szczerek and Tuszyński https://lindseyh037yfo0.bloginder.com/profile