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Design and experimental investigation on vibration system of longitudinal-torsional ultrasonic drilling TC4 titanium alloy
ZHAO Bo, BIE Wenbo, WANG Xiaobo, CHANG Baoqi
ACTA AERONAUTICAET ASTRONAUTICA SINICA . 2020, (1): 423207 -423207 .  DOI: 10.7527/S1000-6893.2019.23207