Bui, T.H., Kien Ha, T., Le Du, M. and Huynh, H.N. 2023. Design and fabricating extruder for bio-material 3D printers. VNUHCM Journal of Engineering and Technology. 6, SI2 (Dec. 2023), In press. DOI:https://doi.org/https://doi.org/10.32508/stdjet.v6iSI2.1155.