Low vision aids. Specification for hand and stand magnifiers, including magnifiers with an integral source of illumination.
NORM herausgegeben am 28.2.1992
Designation standards: BS 7522-1:1992
Note: UNGÜLTIG
Publication date standards: 28.2.1992
Approximate weight : 300 g (0.66 lbs)
Country: British technical standard
Kategorie: Technische Normen BS