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| fréquence de secteur | |||
| fréquence du réseau | |||
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частота сети : 15 phrases in 7 subjects |
| Automobiles | 2 |
| Aviation | 1 |
| Computers | 1 |
| Electronics | 4 |
| Hydraulic engineering | 1 |
| Radio | 2 |
| Technology | 4 |
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