00741naa#a2200205#i#450# EN\\bibl\27807 20241221190625.6 2223-4608 20190423b2019####ek#y0engy0150####ca RUS RU Scientifically substantiated increase of piezoelectric transformer reliability of cog-wheel ultrasonic machining Journal article Bryansk Bryansk State Technical University 2019 5 с. Journal article local Инженерное дело. Техника в целом. Транспорт. 62 RUS Agapov Sergey Ivanovich Sidyakin Yuryi Ivanovich Tolstyakov Andrey Fedorovich bstu.editorum.ru