Based on the energy equation of hydrodynamics, the distribution of velocity and pressure in the classifier was analyzed.

利用流体力学的能量方程，分析了分级机内的速度和压力分布。

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Based on the theory of gas percolation, law of mass conservation and hydrodynamics, basic mathematical equation of gas flow model was established.

依据瓦斯渗流理论、质量守恒定律和流体力学，建立了瓦斯流动数学模型的基本方程。

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