伴有相变过程的气-液两相渗流是一个变质量传输问题。
Mass transfer is included in the flow of a gas-liquid mixture through porous media with phase change.
同时，催化剂的活性和选择性受到扩散限制和质量传输的影响。
The reduction activity of nitrate and the formation of ammonium are mainly controlled by the diffusion limitation and the mass transfer of the reactants.
高炉侵蚀归根结底是动量传输、热量传输和质量传输这三传的问题。
The erosion of blast furnace is a problem of three kinds of transfer (momentum transfer, heat transfer and mass transfer).
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