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| сверхнизкие частоты (30-300 Гц) | |||
| сверхнизкие частоты (30-300 гц) | |||
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| сверхнизкая частота | |||
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ultralow frequencies : 5 phrases in 4 subjects |
| Biology | 2 |
| Makarov | 1 |
| Medical | 1 |
| Telecommunications | 1 |
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