Magnetically, hard sintered materials. Marks
STANDARD published on 1.7.1977
Designation standards: GOST 21559-76
Publication date standards: 1.7.1977
The number of pages: 43
Approximate weight : 129 g (0.28 lbs)
Country: Russian technical standard
Category: Technical standards GOST
Implemented changes and corrections:
Amd. 12.82
Amd. 8.87
Amd. 5.91