IMPROVEMENT OF SURFACE ROUGHNESS DURING TURNING OF PRE-HEATED MILD STEEL USING VOICE ACTIVATED ULTRASONIC WAVES. Jurnal Teknologi, [S. l.], v. 76, n. 6, 2015. DOI: 10.11113/jt.v76.5698. Disponível em: https://journals.utm.my/jurnalteknologi/article/view/5698.. Acesso em: 23 jul. 2024.