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| элементарный излучатель Гюйгенса; элементарный источник Гюйгенса | |||
| источник Гюйгенса; элементарный излучатель Гюйгенса | |||
| Huygens source: 3 phrases in 2 subjects |
| Electronics | 1 |
| Makarov | 2 |
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