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初相 : 29 phrases in 13 subjects |
| Agriculture | 1 |
| Air defense | 1 |
| Ceramics | 1 |
| Electronics | 7 |
| Engineering geology | 2 |
| General | 1 |
| Geophysics | 1 |
| Metallurgy | 2 |
| Oil / petroleum | 2 |
| Sociology | 1 |
| Space | 3 |
| Technology | 6 |
| Wind Energy | 1 |
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