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| 岩石爆破; 碉堡; 掩体; 工棚; 木屋; 钢筋混凝土的半球形房屋 | |||
| 巨石钻孔爆破 | |||
| 分块钻孔; 岩块爆破; 爆破大石 | |||
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blockholing : 4 phrases in 3 subjects |
| Engineering geology | 1 |
| Explosives and Explosive Ordnance Disposal | 1 |
| Technology | 2 |
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