FEASIBILITY STUDY OF ULTRASONIC FREQUENCY APPLICATION ON FDM TO IMPROVE PARTS SURFACE FINISH. Jurnal Teknologi, [S. l.], v. 77, n. 32, 2015. DOI: 10.11113/jt.v77.6983. Disponível em: https://journals.utm.my/jurnalteknologi/article/view/6983.. Acesso em: 23 jul. 2024.