 |
| rotary drilling: 93 phrases in 16 subjects |
| Chemistry | 1 |
| Construction | 6 |
| Drilling | 7 |
| Electronics | 1 |
| Geology | 3 |
| Gold mining | 4 |
| Hydrology | 1 |
| Makarov | 1 |
| Military | 1 |
| Mining | 9 |
| Oil / petroleum | 22 |
| Oil and gas | 7 |
| Oil and gas technology | 7 |
| Oilfields | 9 |
| Production | 4 |
| Technology | 10 |