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| безграничная среда | |||
| бесконечная среда; неограниченная среда | |||
| infinite medium: 12 phrases in 7 subjects |
| Electronics | 3 |
| Geophysics | 2 |
| Makarov | 3 |
| Mathematics | 1 |
| Metrology | 1 |
| Nanotechnology | 1 |
| Technology | 1 |
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