sukendar, Sukendar, Sagir Alva, and Dianta Ginting. 2026. “Evaluating Vegetable Oils As Eco-Friendly Alternatives in Metal Heat Treatment : Review”. Jurnal Teknik Mesin (Journal Of Mechanical Engineering) 15 (01). Jakarta, Indonesia:69-82. https://doi.org/10.22441/jtm.v15i01.37136.