The product, made of import materials, with the features of abrasion proof, good thermal diffusivity, is mostly applied to woodworking,- marble processing, steel industry and so on. 本产品主要用于木工、理石、铁等行业,采用进口原材料配制而成,其特点是耐磨,散热性好。
Reaction rate constant, effective diffusivity, apparent activation energy, effective diffusion activation energy and resistance in various steps of the reaction process were analyzed in this paper. 并对反应速率常数和有效扩散系数、观反应活化能和有效扩散活化能及反应过程中各步骤阻力进行了分析。
The chloride permeability of blended concrete was measured by the method of electrical conductivity. And it appears that the chloride relative diffusivity is time-dependent and exponentially tapes with time. 文章介绍用混凝土抗氯离子渗透快速试验法研究不同掺合料混凝土氯离子相对扩散系数随时间的变化,得出氯离子相对扩散系数随时间呈指数变化的关系,与有关文献给出的混凝土自然暴露结果相似。
Diffusivity \Dif`fu*siv"i*ty\, n. Tendency to become diffused; tendency, as of heat, to become equalized by spreading through a conducting medium.