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| 坑气; 矿毒; 矿井瓦斯; 爆炸性气体; 矿井气; 矿内气体; 矿井气体; 坑内沼气; 坑内有害气体; 矿内气体沼气; 甲烷气 | |||
| 井下气体 | |||
| 爆炸气体 | |||
| 甲焼气; 坑内有害气体 (矿井瓦斯); 矿坑气 | |||
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рудничный газ : 3 phrases in 2 subjects |
| Geology | 2 |
| Technology | 1 |
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