“TRANSMISSION SYSTEM PROTOTYPE AS SPEED OPTIMIZATION IN THE POWER DRIVE MECHANISM OF THE MAKER S4000 MACHINE AT PT DM”. Teknobiz : Jurnal Ilmiah Program Studi Magister Teknik Mesin, vol. 15, no. 3, Nov. 2025, pp. 141-50, https://doi.org/10.35814/gws9wp29.