CONTRIBUTION IN CALCULATION OF ULTRASONIC TRANSDUCERS USED IN METAL REWORKING PROCESS BY WELDING IN ULTRASONIC FIELD. Nonconventional Technologies Review, [S. l.], v. 21, n. 1, 2017. Disponível em: https://revtn.ro/index.php/revtn/article/view/167. Acesso em: 17 apr. 2026.