Мельник, О.В. and Якобчук, О.Є. 2021. ENSURING THE EFFICIENCY OF FUEL AND HYDRAULIC UNITS OF AIRCRAFT BY RESTORING WORN PARTS. Problems of Friction and Wear. 1(90) (Mar. 2021), 97–102. DOI:https://doi.org/10.18372/0370-2197.1(90).15253.