Mulia M, Suardi S, Susilo H, Sinurat FK, Supriadi S. Identification of hardness values of boiler pipes after heating and without heating process. Computational [Internet]. 2024 Jul. 27 [cited 2026 May 5];13(2):50-6. Available from: https://trigin.pelnus.ac.id/index.php/Computational/article/view/177