Testing of heat-treated surfaced samples and machine parts for hardness and wear resistanceBakhodir Tilabov, Akbarjon Jumaev, Jamshid Sherbutaev, Ulugbek Normurodov and Giyosiddin SalimovE3S Web Conf., 548 (2024) 03014DOI: https://doi.org/10.1051/e3sconf/202454803014