Concrete towers for railway high voltage signal line of autoblock. Technical requirements
NORMA vydána dne 1.7.1977
Designation standards: GOST 22131-76
Note: NEPLATNÁ
Publication date standards: 1.7.1977
The number of pages: 10
Approximate weight : 30 g (0.07 lbs)
Country: Russian technical standard
Kategorie: Technické normy GOST