The further study of coal micro-structural features has great significance for gas mass transfer mechanism and efficient development of coalbed methane.
深入研究煤层气储层微观结构，对认清煤层气传质机理和高效开发具有重要意义。
From the view of mass transfer mechanism, the process of chloride transmission in the concrete is considered to be diffusive.
从物质的传质机理角度分析认为，氯离子在混凝土中的传质过程为扩散过程。
Based on turbulent diffusion theory and the mechanism of liquid-gas interfacial mass transfer, a conceptual model of turbulent re-aeration process is proposed.
本文根据紊动扩散理论及气液界面质量传递过程，提出了紊动水体复氧过程的概化模型。
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