 |
| pump efficiency: 28 phrases in 13 subjects |
| Astronautics | 1 |
| Automated equipment | 1 |
| Energy industry | 1 |
| Hydrology | 1 |
| Makarov | 1 |
| Mechanic engineering | 4 |
| Natural resourses and wildlife conservation | 2 |
| Oil / petroleum | 6 |
| Oil and gas | 1 |
| Oilfields | 1 |
| Pumps | 1 |
| Technology | 7 |
| Water resources | 1 |