BS 2813:1957

Polarized & non-polarized plugs for use on hearing aids..

NORMA vydaná dňa 17.1.1957

The information about the standard:

Designation standards: BS 2813:1957
Note: NEPLATNÁ
Publication date standards: 17.1.1957
Approximate weight : 300 g (0.66 lbs)
Country: British technical standard
Kategória: Technické normy BS