Core bits for core barrels. Types and main dimensions
STANDARD published on 1.7.1976
Designation standards: GOST 21210-75
Publication date standards: 1.7.1976
The number of pages: 11
Approximate weight : 33 g (0.07 lbs)
Country: Russian technical standard
Category: Technical standards GOST
Implemented changes and corrections:
Amd. 12.86
Amd. 12.89