BS 942:1941

Formulae for calculating intensities of lighthouse beams and beams from cognate projection apparatus..

NORMA vydána dne 17.2.1941

The information about the standard:

Designation standards: BS 942:1941
Note: NEPLATNÁ
Publication date standards: 17.2.1941
Approximate weight : 300 g (0.66 lbs)
Country: British technical standard
Kategorie: Technické normy BS