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 [Internet]. 24 November 2024 [dikutip 8 Oktober 2025];3(2):207-12. Tersedia pada: https://journal.unram.ac.id/index.php/empd/article/view/5407