Trinh VL, Nguyen TS, Chu KT, Tran VH. Study on Machining Process of Multi-step Holes by Using The Standard Cutting Tool and Stepped Drill. JAETS [Internet]. 2026 Jun. 15 [cited 2026 Jun. 15];7(2):896-909. Available from: https://journal.yrpipku.com/index.php/jaets/article/view/7327