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| 单熔区 | |||
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| 单熔区 | |||
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single-zone : 33 phrases in 10 subjects |
| Drilling | 1 |
| Electronics | 1 |
| Engineering geology | 1 |
| Geophysics | 1 |
| Hydroelectric power stations | 1 |
| Metallurgy | 7 |
| Mining | 4 |
| Oil / petroleum | 9 |
| Refrigeration | 4 |
| Technology | 4 |
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