| |||
| Vorbohrer; Pilotbohrer m | |||
|
bit core : 23 phrases in 8 subjects |
| Coal | 4 |
| Drilling | 1 |
| General | 1 |
| Mechanic engineering | 1 |
| Metallurgy | 2 |
| Mining | 12 |
| Technology | 1 |
| Tools | 1 |
| |||
| Vorbohrer; Pilotbohrer m | |||
|
bit core : 23 phrases in 8 subjects |
| Coal | 4 |
| Drilling | 1 |
| General | 1 |
| Mechanic engineering | 1 |
| Metallurgy | 2 |
| Mining | 12 |
| Technology | 1 |
| Tools | 1 |