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| 有毒气体井下由于煤炭、矿石、坑木的氧化, 积水和特殊地层吸附氧气,使氧分减少；或者由于煤炭、矿石及地层中渗出气体的影响,均会使井下空气的成分发生变化。这种气体称为矿井气体、矿井瓦斯或危险气体。有毒气体则指有害气体中微量的带毒性的气体。例如一氧化碳、氮的氧化物等，参见 toxic gas | |||
| 有毒气体 | |||
| 毒气; 毒性气体 | |||
| 有害气体 | |||
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poisonous gas : 3 phrases in 3 subjects |
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