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内部 通话 : 34 phrases in 11 subjects |
| Architecture | 2 |
| Aviation | 5 |
| Communications | 1 |
| Electronics | 3 |
| General | 3 |
| Metallurgy | 1 |
| Securities | 1 |
| Shipbuilding | 1 |
| Space | 1 |
| Technology | 15 |
| Telecommunications | 1 |
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