Abdullah M, Aghdeab S, Ghazi S. Optimization of Surface Roughness for Al-alloy in Electro-chemical Machining (ECM) using Taguchi Method. Eng. J. [انترنت]. 12017 [وثق 202019];23(10):62-1. Available from: http://joe.uobaghdad.edu.iq/index.php/main/article/view/171