ARITONANG, S. D.; PURBA, J. S. Observation Results of the Effect of Pre breaker Machines on Raw Rubber Products at PT Bridgestone Sumatra Rubber Estate. Journal of Engineering Science and Technology Management (JES-TM), [S. l.], v. 6, n. 1, p. 179–186, 2026. DOI: 10.31004/jestm.v6i1.402. Disponível em: https://jes-tm.org/index.php/jestm/article/view/402. Acesso em: 29 apr. 2026.