• Sulfur dioxide is a toxic gas.

    二氧化硫有毒气体

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  • City gas is a kind of flammable or toxic gases.

    燃气易燃易爆有毒气体

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  • This paper also gives a brief account about the compositions of the toxic gas...

    简要地介绍了瓦斯爆炸后有害气体组分

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  • This paper also gives a brief account about the compositions of the toxic gas...

    简要地介绍了瓦斯爆炸后有害气体组分

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