Borodina , N., Cheberiachko , S., Cheberyachko , Y., Deryugin О., Radchuk , D. and Klimov , D. 2020. Study of protective efficiency of respirator with forced air supply. Social Development and Security. 10, 6 (Dec. 2020), 192-201. DOI:https://doi.org/10.33445/sds.2020.10.6.18.