Guidelines for the production and acceptance of construction works in cities and industrial enterprises of collector tunnels constructed by the shield tunneling method.
NORMA vydána dne 1.10.1974
Designation standards: SN 322-74
Publication date standards: 1.10.1974
The number of pages: 24
Approximate weight : 72 g (0.16 lbs)
Country: Russian technical standard
Kategorie: SN