Shahada, A., B. Abbas S. Alwanb, and Kadhemm. A. Abedc. 2019. “Effect of Pulse Repetition Rate on Micro Hardness on the Surface and Cross Section of Gray Cast Iron by Using ND-YAG Laser”. Anbar Journal of Engineering Science 10 (1): 67-71. https://doi.org/10.37649/aengs.2019.171366.