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吸收 限 : 26 phrases in 12 subjects |
| Air defense | 1 |
| Architecture | 1 |
| Business | 1 |
| Earth sciences | 2 |
| Economy | 1 |
| Electronics | 2 |
| Engineering geology | 1 |
| General | 1 |
| Geophysics | 1 |
| Metallurgy | 1 |
| Oil / petroleum | 3 |
| Technology | 11 |
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