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. 2024;3(2):207-212. Accessed October 8, 2025. https://journal.unram.ac.id/index.php/empd/article/view/5407