Photoflash devices. Method for determining the guide number
NORMA vydána dne 1.1.1980
Designation standards: GOST 23287-78
Publication date standards: 1.1.1980
The number of pages: 7
Approximate weight : 21 g (0.05 lbs)
Country: Russian technical standard
Kategorie: Technické normy GOST
Implemented changes and corrections:
Amd. 4.85