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| 软弱结构面; 脆弱面 | |||
| 软弱面抗剪或抗拉强度低于周围物料强度的表面或窄平面区 | |||
| 软弱面 | |||
| 弱面; 软弱结构面【地 | |||
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| 脆弱面; 弱面 | |||
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weak plane : 5 phrases in 3 subjects |
| Engineering geology | 2 |
| Explosives and Explosive Ordnance Disposal | 1 |
| Technology | 2 |
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