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| 裂缝特征 | |||
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| 断裂特性 | |||
| 断裂特征 | |||
| fracture characteristics: 6 phrases in 4 subjects |
| Engineering geology | 2 |
| Explosives and Explosive Ordnance Disposal | 1 |
| Metallurgy | 2 |
| Rail transport | 1 |
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