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校 过的 : 18 phrases in 11 subjects |
| Automobiles | 1 |
| Aviation | 1 |
| Business | 2 |
| Drilling | 1 |
| General | 3 |
| Geophysics | 2 |
| International trade | 1 |
| Metallurgy | 1 |
| Securities | 1 |
| Technology | 4 |
| Typography | 1 |
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