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| 指标比值 | |||
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indicator ratio : 18 phrases in 9 subjects |
| Aviation | 2 |
| Electronics | 2 |
| General | 1 |
| Geology | 1 |
| Geophysics | 4 |
| Oil / petroleum | 2 |
| Oil processing plants | 1 |
| Space | 2 |
| Technology | 3 |
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