The electric field of the sliding contact during the interaction of the pantograph and the contact wireIldar Bayanov, Timur Badretdinov, Sardor Muminov, Islom Karimov, Saidaziz Saydivaliev and Elyor SaliyevE3S Web Conf., 264 (2021) 04029DOI: https://doi.org/10.1051/e3sconf/202126404029