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速断开 : 39 phrases in 14 subjects |
| Air defense | 1 |
| Automobiles | 5 |
| Aviation | 4 |
| Construction | 1 |
| Drilling | 6 |
| Electronics | 8 |
| General | 1 |
| Geophysics | 1 |
| Hydroelectric power stations | 1 |
| Mechanics | 1 |
| Metallurgy | 1 |
| Space | 3 |
| Technology | 5 |
| Telecommunications | 1 |
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