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黑云母岩 : 48 phrases in 9 subjects |
| Agriculture | 1 |
| Architecture | 2 |
| Earth sciences | 10 |
| Engineering geology | 2 |
| General | 2 |
| Geology | 1 |
| Hydroelectric power stations | 3 |
| Oil / petroleum | 4 |
| Technology | 23 |
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