“PENGARUH PENAMBAHAN UNSUR TEMBAGA PADA PENGECORAN TEKAN BLOK SILINDER BEKAS TERHADAP NILAI IMPAK DAN KEAUSAN : EFFECT OF ADDITION OF COPPER ELEMENTS IN THE COMPRESSION CASTING OF USED CYLINDER BLOCKS ON IMPACT VALUE AND WEAR”, empd, vol. 3, no. 2, pp. 207–212, Nov. 2024, Accessed: Oct. 08, 2025. [Online]. Available: https://journal.unram.ac.id/index.php/empd/article/view/5407