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| 巷道试验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、引爆可燃气、煤尘的安全性试验 | |||
| gallery test: 4 phrases in 2 subjects |
| Explosives and Explosive Ordnance Disposal | 3 |
| Rail transport | 1 |
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