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подача сигнала: 19 phrases in 11 subjects |
Astronautics | 2 |
Aviation | 2 |
Biology | 1 |
Hydraulic engineering | 1 |
International Monetary Fund | 2 |
Medical appliances | 1 |
Military | 5 |
Mining | 1 |
Radio | 1 |
Road sign | 1 |
Technology | 2 |