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| power spectra | |||
| energy spectrum | |||
| power spectrum | |||
| spectre d 'énergie: 12 phrases in 8 subjects |
| Earth sciences | 2 |
| Electronics | 3 |
| High energy physics | 1 |
| Lighting other than cinema | 1 |
| Natural resourses and wildlife conservation | 1 |
| Physical sciences | 1 |
| Technology | 1 |
| Радиоактивное излучение | 2 |