A. F. H. ALIAS and M. Z. . Ibrahim, “Evaluation of The Operational Performance and Maintenance of Valves In Biodiesel Plant”, peat, vol. 2, no. 2, pp. 931–937, Dec. 2021, Accessed: Jul. 18, 2024. [Online]. Available: https://penerbit.uthm.edu.my/periodicals/index.php/peat/article/view/932