经过纯的火焰你知道天上的关口。

Know ye the celestials pass through the pure flame.

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实验证明，根据这一原则设计的开缝纯体燃烧器对低挥发分煤粉的着火与火焰稳定具有较好的适应性。

Experiments show that a new-type pulverized coal burner with a slit bluff-body designed on the said principle is suitable for the ignition and flame stability of low volatile pulverized coal.

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在火焰加速管中，对不同障碍物情况下的纯瓦斯、有沉积煤尘的瓦斯燃烧过程进行了实验研究。

The combustion process of gas with coal dust or gas with different obstacles in fire-accelerating pipelines has been experimentally studied.

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