Tribological exams were completed using a ball-on-disc T-eleven tester. The balls had been manufactured from metal, Whilst the discs have been made of metal, aluminium oxide, zirconium oxide, polyamide and poly(methyl methacrylate). The description with the unit along with the methods continues to be offered within the literature (Szczerek and https://cardere077iuc1.bloggactivo.com/profile