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| 软岩; 软弱岩 | |||
| 软［弱］岩石 | |||
| 软质岩石; 脆弱岩石 | |||
| 弱岩石干抗压强度低于30MPa,软化系数小于0.6的岩石 | |||
| 软岩 (石) | |||
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weak rock : 4 phrases in 2 subjects |
| Engineering geology | 2 |
| Technology | 2 |
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