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| 覆道: 29 phrases in 12 subjects |
| Air defense | 1 |
| Automobiles | 2 |
| Aviation | 1 |
| Business | 1 |
| Engineering geology | 1 |
| General | 1 |
| Geophysics | 1 |
| Metallurgy | 1 |
| Oil / petroleum | 2 |
| Space | 5 |
| Surgery | 1 |
| Technology | 12 |
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