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| 崩落 | |||
| 爆落; 炸开掉; 击毙; 米煤爆破国外大都采用滚筒采煤机、刨煤机等机械进行采煤。但煤层的倾斜度大于25° 时，宜采用爆破方法采煤。煤层中甲烷的含量较多时，必须采用确能防止瓦斯和煤尘爆炸的爆破材料和爆破方式。禁止采用导火索起爆法 | |||
| 爆破 | |||
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blast down : 7 phrases in 4 subjects |
| Electronics | 2 |
| Explosives and Explosive Ordnance Disposal | 1 |
| Metallurgy | 3 |
| Technology | 1 |
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