不同煤种挥发份燃烧时产物中CO_2和CO的差异很明显，产物中CO_2浓度高的煤种，相应的CO也高。

For different coal, CO_2 and co difference is very obvious in outcomes of volatile combustion. If CO_2 density is high, co is also high.

youdao

不同煤种挥发份燃烧时产物中CO_2和CO的差异很明显，产物中CO_2浓度高的煤种，相应的CO也高。

For different coal, CO_2 and co difference is very obvious in outcomes of volatile combustion. If CO_2 density is high, co is also high.

youdao