GB 8347-1987

Methods of measurement for effective aperture and relative aperture of photographic lenses

NORM herausgegeben am 1.1.1987

English, Chinesisch -
Elektronische PDF (442.00 EUR)

The information about the standard:

Designation standards: GB 8347-1987
Note: UNGÜLTIG
Publication date standards: 1.1.1987
Country: Chinese technical standard
Kategorie: Technische Normen GB