 |
| |||
| aft section (PH); aft casting segment (РДТТ) | |||
| bottom section (разборного геодезического сигнала) | |||
| oil string (MichaelBurov) | |||
| bottom section; bottom segment | |||
| нижняя секция: 25 phrases in 11 subjects |
| Astronautics | 5 |
| Aviation | 2 |
| Construction | 4 |
| Firefighting and fire-control systems | 1 |
| Forestry | 1 |
| General | 3 |
| Makarov | 1 |
| Oil / petroleum | 2 |
| Oil and gas | 1 |
| Oil and gas technology | 4 |
| Technology | 1 |