The Effectiveness Using Drill Bit Sharpening Jig during Practical Practices in Politeknik Muadzam Shah . MALAYSIAN JOURNAL OF INNOVATION IN ENGINEERING AND APPLIED SOCIAL SCIENCES (MYJIEAS), [S. l.], v. 2, n. 01, p. 1–7, 2022. Disponível em: https://myjieas.psa.edu.my/myjieas/article/view/22. Acesso em: 4 mar. 2026.