“Analisa Pengaruh Heat Treatment Terhadap Nilai Kekerasan Expeller Arm Digester Di PT. Hindoli Mill Sungai Lilin”. Jurnal Serambi Engineering 10, no. 2 (March 20, 2025). Accessed August 13, 2026. http://jse.serambimekkah.id/index.php/jse/article/view/787.