In survey of this phenomenon, using spot date, physical and mathematics stimulant method, flowage and diffusion are studied and wellbore flow and air diffusion model of CO are established.
针对这一现象，运用现场数据以及物理模拟和数学模拟方法首次通过对CO气体流动、扩散等的综合研究，建立了CO井筒流动及大气扩散模型。
In this article, the mathematics model of multi stage carburizing is obtained and its physical meaning is discussed.
本文建立了多段法渗碳的数学模型，并讨论其物理意义。
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