Experimental sample for diagnosis of hydraulic drive pumps of agricultural equipment by pressure pulsation coefficientMikhail Kostomakhin, Nikolay Petrishchev, Alexander Sayapin, Efim Pestryakov, Vitalii Tseiko and Nikolay KostomakhinE3S Web of Conf., 458 (2023) 10013DOI: https://doi.org/10.1051/e3sconf/202345810013