Setiawan, A., Pradigdo, D., & Wibowo, F. H. (2021). The GRINDER CONSTRUCTION DESIGN OF A BALL MILL MACHINE FOR THE PROCESS OF HOMOGENIZING BLACK POWDER USING AN AUTOMATIC SYSTEM. Jurnal Otoranpur, 2(2), 22–28. https://doi.org/10.54317/oto.v2iOktober.187