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| nitrogen removal; removing nitrogen | |||
| азот удаление: 21 phrases in 12 subjects |
| Astronautics | 1 |
| Caspian | 1 |
| Chemistry | 1 |
| Construction | 1 |
| Ecology | 3 |
| Energy industry | 4 |
| Gas processing plants | 1 |
| Makarov | 2 |
| Medical | 1 |
| Natural resourses and wildlife conservation | 2 |
| Oil and gas | 3 |
| Water supply | 1 |