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理论指 数 : 15 phrases in 10 subjects |
| Business | 3 |
| Drilling | 1 |
| Economy | 3 |
| Finances | 1 |
| Mathematics | 1 |
| Metallurgy | 1 |
| Project management | 1 |
| Securities | 2 |
| Space | 1 |
| Technology | 1 |
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