 |
| |||
| sealed bit assembly | |||
| sealed drill bit bearing assembly (шарошечного); sealed drilling bit bearing assembly (шарошечного) | |||
| герметизированная опора долота: 16 phrases in 7 subjects |
| Drilling | 5 |
| Oil / petroleum | 3 |
| Oil and gas | 3 |
| Oil and gas technology | 1 |
| Oilfields | 1 |
| Sakhalin | 1 |
| Technology | 2 |