 |
| |||
| bit bearing; drilling bit bearing | |||
| опора долота: 72 do fraz, 8 tematyki |
| Olej i gaz | 9 |
| Pola naftowe | 11 |
| Ropa / ropa naftowa | 21 |
| Sachalin | 1 |
| Technika i technologia | 14 |
| Technologia ropy i gazu | 8 |
| Transport | 2 |
| Wiercenie | 6 |
|
| |||
| bit bearing; drilling bit bearing | |||
| опора долота: 72 do fraz, 8 tematyki |
| Olej i gaz | 9 |
| Pola naftowe | 11 |
| Ropa / ropa naftowa | 21 |
| Sachalin | 1 |
| Technika i technologia | 14 |
| Technologia ropy i gazu | 8 |
| Transport | 2 |
| Wiercenie | 6 |