00751naa#a2200193#i#450# EN\\bibl\124372 20260623202517.2 2223-4608 20260529b2026####ek#y0engy0150####ca RU Frictional moment variation and friction loss change in the magnetic fluid seal of a frequency-controlled electromotor shaft depending on the operating mode changes Journal article Bryansk Bryansk State Technical University 2026 10 с. Journal article local Общие вопросы. Трение в машине. 621.891 Vlasov Aleksey Mihaylovich Kazakov Yuri Borisovich Vedernikova Irina Igorevna bstu.editorum.ru