A Pedagogical Methodology for Introducing CAD Modeling Tools and 3D Printing Technologies to Adult TraineesMaria Chatzikyrkou, Athanasios Manavis, Prodromos Minaoglou and Nikolaos EfkolidisMATEC Web Conf., 318 (2020) 01032DOI: https://doi.org/10.1051/matecconf/202031801032