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| 频率通报 | |||
| 车里雅宾斯克拖拉机工厂; 频移通报 | |||
| Russian thesaurus | |||
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| ЧТ | |||
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частотное телеграфирование : 7 phrases in 2 subjects |
| General | 4 |
| Technology | 3 |
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