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| последовательная система | |||
| 顺序系统: 21 phrases in 9 subjects |
| Electronics | 2 |
| General | 5 |
| Information technology | 1 |
| Jet engines | 2 |
| Mathematics | 1 |
| Military | 1 |
| Operation systems | 1 |
| Radio | 2 |
| Technology | 6 |
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