Noxious gas emission 有害气体挥发
emission of noxious gas 有害气体排放
abatement of noxious gas 有害气体治理
poisonous gas noxious 一种有毒的气体
The geological problems of development and utilization of underground space resources in Beijing are state of storing of groundwater,the changing of groundwater level,ground subsidence,active fault,covered karst collapse and the underground noxious gas.
北京平原地下空间资源开发利用的地质问题主要有地下水的赋存状态、地下水位的变化、地面沉降、活动断裂、隐伏岩溶塌陷、地下有害气体等等。
参考来源 - 北京市地下空间资源开发利用规划的地质问题·2,447,543篇论文数据，部分数据来源于NoteExpress
The thesis demonstrates the feasibility of natural ventilation to control concentration of noxious gas in the sewer tunnel.
并论证利用自然风稀释污水隧道内有害气体浓度的理论可行性。
Because these accident's occurrence mainly in the industry environment USES flammable explosive, the virulent noxious gas to create improper.
这些事故的发生主要因为工业环境中使用易燃易爆、有毒有害气体不当造成。
The utility model can not only prevent the dust and noxious gas in the air from entering the water box but also purify the water quality with an excellent effect.
本实用新型既可以防止空气中的灰尘、有害气体等进入水箱，又能很好地净化水质。
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