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| охрана птиц | |||
птицезащита (на воздушных линиях электропередач: Suggested Practices for Avian Protection On Power Lines  nrc.gov 'More) | |||
| bird protection: 9 phrases in 5 subjects |
| Ecology | 5 |
| General | 1 |
| Natural resourses and wildlife conservation | 1 |
| Oil / petroleum | 1 |
| Technology | 1 |