00641nam#a2200157#i#450# EN\URAL'SKIY GOSUDARSTVENNYY AGRARNYY UNIVERSITET\book\1288 20250613064145.5 20180411d2018####ek#y0engy0150####ca RU THE IMPROVED PISTON OF THE HYDRAULIC DRIVE UNITS IN TRACTORS AND AGRICULTURAL MACHINES Monography Ekaterinburg Ural State Agrarian University 2018 420 с. Monography local Тракторное и сельскохозяйственное машиностроение. 55.57 grnti Drozdov Vladimir Borisovich usau.editorum.ru