
Specification for protractors for drawing office use.
NORM herausgegeben am 31.1.1975
Designation standards: BS 2457:1975
Publication date standards: 31.1.1975
The number of pages: 8
Approximate weight : 24 g (0.05 lbs)
Country: British technical standard
Kategorie: Technische Normen BS
Includes preferred sizes, for circular and semi-circular protractors made from transparent plastics. Specifies qualities of suitable materials. Status: Confirmed