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指数 管 : 19 phrases in 10 subjects |
| Earth sciences | 1 |
| Ecology | 1 |
| Electronics | 3 |
| General | 1 |
| International trade | 1 |
| Metallurgy | 1 |
| Oil / petroleum | 4 |
| Securities | 1 |
| Space | 4 |
| Technology | 2 |
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