ANALISIS SURFACE ROUGHNESS DAN MATERIAL REMOVAL RATE PADA PROSES SINKER-EDM MENGGUNAKAN ELEKTRODA GRAPHITE: ANALYSIS OF SURFACE ROUGHNESS AND REMOVAL RATE OF MATERIAL IN SINKER-EDM PROCESS USING GRAPHITE ELECTRODE. teknologika. 2022;12(1):22-34. doi:10.51132/teknologika.v12i1.157