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| 岩石炸药用于地面及无可燃气〈煤尘〉爆炸危险的煤矿井下爆破岩石的混合炸药 | |||
| 岩石炸药 | |||
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rock explosive : 17 phrases in 3 subjects |
| Earth sciences | 1 |
| Explosives and Explosive Ordnance Disposal | 13 |
| Technology | 3 |
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