Samsura DATR, Butarbutar EG, Hermanto T. Analysis of Production Efficiency and Cutting Quality of Plastic Ring Cup Machine. IRA J.Tek. Mesin Dan Apl [Internet]. 2025 Aug. 25 [cited 2025 Sep. 30];4(2):231-7. Available from: http://e-journals.irapublishing.com/index.php/IRAJTMA/article/view/144