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| 安全〔合格〕炸药 | |||
| 安全炸药 | |||
| 合格炸药 | |||
| 核准炸药 | |||
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| 煤矿许用炸药允许在有可燃气和煤尘爆炸危险的矿井中使用的炸药。 permitted explosives | |||
| 安全炸药 | |||
| permissible explosive: 14 phrases in 3 subjects |
| Electronics | 1 |
| Explosives and Explosive Ordnance Disposal | 10 |
| Technology | 3 |
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