NA 005
DIN Standards Committee Building and Civil Engineering
Standards
[Withdrawn]
DIN 21913-6
DIN 21913-6
Mine plans - Deep mining - Part 6: Safekeeping of mining produced hollows
Title (German)
Bergmännisches Risswerk - Tiefbau - Teil 6: Verwahrung bergmännisch hergestellter Hohlräume