
Low vision aids. Specification for spectacle magnifiers and similar devices.
NORM herausgegeben am 15.3.1993
Designation standards: BS 7522-2:1993
Note: UNGÜLTIG
Publication date standards: 15.3.1993
Approximate weight : 300 g (0.66 lbs)
Country: British technical standard
Kategorie: Technische Normen BS