P. Vasiljev YOON SEOK JIN Kim Hyun Jai 정형진 2024-01-13T18:30:55Z 2024-01-13T18:30:55Z 2021-09-29 https://pubs.kist.re.kr/handle/201004/109950 English resonance longitudinal-torsion modes ultrasonic motor progressive motor standing wave Construction of ultrasonic motors by combination of resonance longitudinal-torsion modes Conference 1 Vibroengineering-98 Vibroengineering-98 LI