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| излучение класса А4 (факсимильная связь, модуляция посредством изменения амплитуды или частотная модуляция поднесущей) | |||
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class А 4 emission : 5 phrases in 3 subjects |
| Electronics | 2 |
| General | 2 |
| Makarov | 1 |
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