Sarmidi Sarmidi, Yulius Mases, and Age Palogan Kesuma. “Analisis Efisiensi Jam Kerja Excavator CAT 345 GC Di Area Penambangan Pit E Banko Barat PT. Rifansi Dwi Putra”. Jurnal Ilmiah Teknik dan Sains 1, no. 1 (August 29, 2023): 11–18. Accessed October 21, 2026. https://jurnal.akipba.ac.id/index.php/JITS/article/view/3.