It is evident that the permeability is not a constant. 显然磁导率不是常数。
Most theoretical models assume constant permeability of wastewater sludge floc. 摘要文献中胶羽模型多假设胶羽内部具有相同之透过率。
A method of fitting the experimental data of constant pressure displacement for calculating relative permeability of oil and water 拟合恒压驱替实验数据计算相对渗透率方法研究