Angsuseranee, Natchanun, and Bhadpiroon Watcharasresomroeng. “Marking Lines Mechanism and Problem Solving in the Sheet Metal Bending Process”. RMUTL Engineering Journal 5, no. 2 (December 28, 2020): 10–18. Accessed May 3, 2024. https://ph01.tci-thaijo.org/index.php/RMUTLEngJ/article/view/243726.