Alrefo, Ibrahim Farhan Salman, Walid Ibrahim Alnusirat, and Litvin Оleksandr. 2019. “Investigation of the Influence of Hardness Characteristics of the Collet-Part Lathe System”. Eastern-European Journal of Enterprise Technologies 2 (7 (98):20-25. https://doi.org/10.15587/1729-4061.2019.164091.