AENOR - UNE 22090
EFFICIENCY CALCULATION OF THE COAL MINES.
inactive, Most Current
| Organization: | AENOR |
| Publication Date: | 15 February 1955 |
| Status: | inactive |
| Page Count: | 2 |
| ICS Code (Mining and quarrying): | 73.020 |
Document History
UNE 22090
February 15, 1955
EFFICIENCY CALCULATION OF THE COAL MINES.
A description is not available for this item.