Purwantono, Purwantono, Nelvi Erizon, Nofri Helmi, Muhammad Akhbar, and Muhibuddin Muhibuddin. 2020. “Effect of Spring Back on Formation Process of Sheet Metal Bending Plates”. Teknomekanik 3 (1), 28-35. https://doi.org/10.24036/tm.v3i1.5872.