GOST R 50399-1992 Air-foam nozzies. Specifications has been changed from GOST 11101-1973 Air-foam nozzle. Specifications.
GOST R 50399-1992 Air-foam nozzies. Specifications was changed to GOST R 53251-2009 Fire-fighting equipment. Hand foam-nozzles. General technical requirements. Methods of testing.
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