The impact of the amount of pollution of the fluid in the hydraulic system on the working resource of the quarry excavatorNabijon Abduazizov, Kamol Xakimov, Sardor Turdiyev, Akbar Zhuraev and Adham IsmatovE3S Web Conf., 627 (2025) 05001DOI: https://doi.org/10.1051/e3sconf/202562705001