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出灰 : 54 phrases in 11 subjects |
| Architecture | 2 |
| Drilling | 1 |
| Ecology | 2 |
| Engineering geology | 1 |
| General | 3 |
| Metallurgy | 6 |
| Nautical | 2 |
| Nursing | 1 |
| Oil / petroleum | 1 |
| Technology | 34 |
| Telecommunications | 1 |
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