ZILBERGLEIT М. and MARCHENKO, I. 2023. DETERMINATION OF PAPER LUMEN UNIFORMITY DIFFERENT CLASSES. Vestnik of Polotsk State University. Part B. Industry. Applied Sciences. 2 (Sep. 2023), 70-74. DOI:https://doi.org/10.52928/2070-1616-2023-48-2-70-74.