Optimization Study on Turning Process by Using Taguchi-copras MethodDo Duc Trung, Nguyen Huu Quang, Tran Quoc Hoang, Cao The Anh, Nguyen Hong Linh, Hoang Trung Kien, Do Thi Tam and Nguyen Anh TuanE3S Web Conf., 309 (2021) 01010DOI: https://doi.org/10.1051/e3sconf/202130901010