Remaining life of main frame and extension of service life of shunting Locomotives on railways of Republic of UzbekistanOtabek Khamidov, Abdulaziz Yusufov, Shuxrat Jamilov and Shohijakhon KudratovE3S Web of Conf., 365 (2023) 05008DOI: https://doi.org/10.1051/e3sconf/202336505008