Setiawan, A., Pradigdo, D. and 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), pp. 22–28. doi: 10.54317/oto.v2iOktober.187.