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| 试验巷道利用模拟矿井条件的试验巷道,测定炸药或火工品爆炸时能否引燃、引爆瓦斯、煤尘的安全性试验 | |||
| 试验坑道 | |||
| test gallery: 2 phrases in 1 subject |
| Explosives and Explosive Ordnance Disposal | 2 |
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