Guley О. and Vasyuchenko , P. 2019. Conceptual model of the formation of the concept "a steam boiler" and training-oriented classification of the features of this model. Problems of Engineer-Pedagogical Education. 64 (Dec. 2019), 16–28. DOI:https://doi.org/10.32820/2074-8922-2019-64-16-28.