NA 005
DIN Standards Committee Building and Civil Engineering
DIN 21920-1 [Withdrawn] referenced in following documents:
| Document number | Edition | Title |
|---|---|---|
| DIN 22011 | 1993-11 | Investigations of the raw material in hard-coal-mining; treatment of exploratory drillings More |
| DIN 22012 | 1994-01 | Investigations of the raw material in hard-coal-mining; macropetrographic classification and topographic survey of hard-coal and host rock More |
| DIN 22015 | 1993-10 | Investigations of the raw material in hardcoal-mining; macroscopic classification and description of overburden rock More |
