Jurnal Rekayasa Mesin. Front Matter Jurnal Rekayasa Mesin Vol. 21 No. 1 April 2026. j.rekayasa.mesin. [Internet]. 2026 Apr. 30 [cited 2026 May 6];21(1):i-vi. Available from: https://jurnal.polines.ac.id/index.php/rekayasa/article/view/7584