Tribological tests have been performed using a ball-on-disc T-eleven tester. The balls have been made of steel, whereas the discs were being crafted from steel, aluminium oxide, zirconium oxide, polyamide and poly(methyl methacrylate). The description with the unit plus the procedures has actually been presented in the literature (Szczerek and https://collinpmjnx.tinyblogging.com/new-step-by-step-map-for-methylated-seed-oil-75726590