Saragih KP, Tarigan RK, Putri JS. Heat Calculation for PET Preform Heating in the Blow molding Heater Unit of PT. Sinar Sosro. IRA J.Tek. Mesin Dan Apl [Internet]. 2024 Dec. 31 [cited 2025 Jul. 4];3(3):79-86. Available from: https://e-journals.irapublishing.com/index.php/IRAJTMA/article/view/154