AGUSTIAN, ERVAN, Somawardi, and Sugianto. 2021. “Analysis of the Effect of Cooling Media and the Combination of Cooling Holding Time on the Hardness Value of AISI-1045 Steel in the Quenching Process”. Manutech : Jurnal Teknologi Manufaktur 13 (01):25-32. https://doi.org/10.33504/manutech.v13i01.169.