Trinh, V. L., Nguyen, T. S., Chu, K. T., & Tran, V. H. (2026). Study on Machining Process of Multi-step Holes by Using The Standard Cutting Tool and Stepped Drill. Journal of Applied Engineering and Technological Science (JAETS), 7(2), 896-909. https://doi.org/10.37385/1fpc2e08