Tribological tests had been completed employing a ball-on-disc T-11 tester. The balls were product of metal, Whilst the discs have been manufactured from steel, aluminium oxide, zirconium oxide, polyamide and poly(methyl methacrylate). The description in the gadget along with the methods continues to be supplied from the literature (Szczerek and https://keikoc059gov2.wikistatement.com/user