Saputra E. Front Matter Jurnal Rekayasa Mesin Vol. 14 No. 3 Desember 2019. j.rekayasa.mesin. [Internet]. 2019 Dec. 31 [cited 2025 May 18];14(3):i-v. Available from: https://jurnal.polines.ac.id/index.php/rekayasa/article/view/1718