
Brown coals, hard coals and anthracites. Classification by ranks and classes according to reflectance index of vitrinite
NORMA vydaná dňa 1.4.2021
Designation standards: GOST R 59261-2020
Publication date standards: 1.4.2021
The number of pages: 4
Approximate weight : 12 g (0.03 lbs)
Country: Russian technical standard
Kategória: Technické normy GOST