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| soft rock; incompetent rock | |||
| incompetent rock (石); soft rock (石) | |||
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软质岩 : 13 phrases in 6 subjects |
| Earth sciences | 2 |
| Engineering geology | 1 |
| General | 1 |
| Geology | 1 |
| Oil / petroleum | 3 |
| Technology | 5 |
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