Tribological checks were being performed employing a ball-on-disc T-11 tester. The balls have been manufactured from metal, Whilst the discs were being made from metal, aluminium oxide, zirconium oxide, polyamide and poly(methyl methacrylate). The outline of the device and also the methods has been offered within the literature (Szczerek and https://georgeb937yfl9.goabroadblog.com/profile