
Rock bolts for mining and tunnelling; terms.
NORMA vydána dne 1.7.1990
Designation standards: DIN 21521-1:1990-07
Publication date standards: 1.7.1990
The number of pages: 6
Approximate weight : 18 g (0.04 lbs)
Country: German technical standard
Kategorie: Technické normy DIN
Gebirgsanker für den Bergbau und den Tunnelbau; Begriffe.