RATLALAN, R. M. The Effect of Variation of Drilling Machine Rotation Type KB 20 S On ST-40 Material. Jurnal Sains dan Teknik Terapan, [S. l.], v. 3, n. 1, 2025. Disponível em: https://journal.akom-bantaeng.ac.id/index.php/jstt/article/view/76. Acesso em: 13 aug. 2026.