 |
| |||
| interior column | |||
| inner annulus (кессона) | |||
| internal column | |||
| внутренняя колонна: 40 phrases in 11 subjects |
| Chemistry | 2 |
| Drilling | 14 |
| Geophysics | 1 |
| Mechanic engineering | 1 |
| Oil / petroleum | 7 |
| Oil and gas | 4 |
| Oil and gas technology | 4 |
| Oilfields | 1 |
| Sakhalin | 3 |
| Sakhalin R | 2 |
| Technology | 1 |