Determination of flow rate and velocity of fluids in a non-pressurized pipelineMaksud Оtakhanov, Elza Tursunova, Abdullo Khoshimov, Jamila Xusanova and Dilbar BakhromovaE3S Web of Conf., 452 (2023) 02008DOI: https://doi.org/10.1051/e3sconf/202345202008