Front Matter Jurnal Rekayasa Mesin Vol. 16 No. 2 Agustus 2021 Authors Jurnal Rekayasa Mesin DOI: https://doi.org/10.32497/jrm.v16i2.2901 Downloads PDF Published 2021-08-27 Issue Vol. 16 No. 2 (2021): Volume 16, Nomor 2, Agustus 2021 Section Front Matter