00694naa#a2200169#i#450# EN\\bibl\98894 20251208175409.1 1998-8990 20250516b2025####ek#y0engy0150####ca RU JUSTIFICATION OF THE MECHANISM OF THE FIRE EXTINGUISHING ACTION OF THE POWDER BASED ON AN ANALYSIS OF ITS FRACTIONAL COMPOSITION IN A NON-STATIONARY GAS-POWDER FLOW Journal article Saint-Petersburg Saint-Petersburg University of State Fire Service of Emercom of Russia 2025 14 с. Journal article local Порошковые огнетушители. 614.845.1 Kozhevin Dmitriy F. journals.igps.ru