Formation of practical skills modeling and printing of three-dimensional objects in the process of professional training of IT specialistsIhor Hevko, Olha Potapchuk, Taras Sіtkar, Iryna Lutsyk and Pavlo KoliasaE3S Web Conf., 166 (2020) 10016DOI: https://doi.org/10.1051/e3sconf/202016610016