Article, Influence of Copper Electrode Material on Surface Quality in EDM Drilling of Heat-Treated C45 Steel: Influence of Copper Electrode Material on Surface Quality in EDM Drilling of Heat-Treated C45 Steel. JNA [Internet]. 2025 Nov. 18 [cited 2026 Mar. 6];1(1):33-42. Available from: https://jna.com.vn/index.php/home/article/view/8