Longwall powered roof chocks. Basic parameters. General technical requirements. Test methods
NORMA vydána dne 1.1.2014
Designation standards: GOST 31561-2012
Publication date standards: 1.1.2014
The number of pages: 31
Approximate weight : 93 g (0.21 lbs)
Country: Russian technical standard
Kategorie: Technické normy GOST
Implemented changes and corrections:
Amd. 3.22