Analysis The Effect Of Internal Geometry On The Mechanical Properties Of Acrylonitril Butadiene Styrene (ABS) Materials Prepared Using 3D PrintingIvan Junaidy Abdul Karim, Sukiman B and Muhammad Fadly Hi. AbbasE3S Web Conf., 328 (2021) 07018DOI: https://doi.org/10.1051/e3sconf/202132807018