Wahyu R, Iswantoi I. Analysis of Variation in Iron Coating Rubber for Upper Punch Moulds: Analisa Variasi Karet Pelapis Besi untuk Mould Upper Punch. PELS [Internet]. 2024 Feb. 23 [cited 2025 Jul. 1];5:138-43. Available from: https://pels.umsida.ac.id/index.php/PELS/article/view/1567