Tribological tests ended up completed employing a ball-on-disc T-11 tester. The balls were being made of metal, whereas the discs were fabricated from metal, aluminium oxide, zirconium oxide, polyamide and poly(methyl methacrylate). The outline of the system as well as methods continues to be offered while in the literature (Szczerek https://edwardy715uah7.kylieblog.com/profile