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| 路标注意落石 | |||
| 落石在露天开挖边坡和地下巷道顶板上,一些被爆破振松、处于十分危险的悬挂状态、随时可能滚落下来的岩石。因此，在爆破后应及时予以处理以确保施工现场的安全 | |||
| 落石 | |||
| falling rock: 7 phrases in 5 subjects |
| Automobiles | 2 |
| Bridge construction | 1 |
| Drilling | 1 |
| Rail transport | 2 |
| Technology | 1 |
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