Van, Cuong Nguyen, Anh Le Hoang, Cao Dang Long, and Duy Nguyen Hoang. 2023. “Surface Roughness in Metal Material Extrusion 3D Printing: The Influence of Printing Orientation and the Development of a Predictive Model”. Engineering, Technology & Applied Science Research 13 (5). Greece:11672-76. https://doi.org/10.48084/etasr.6162.