用数值模型计算的30 L/min流量下滤材中间层的机械(或外加静电的)过滤效率与填充率及滤层厚度的关系。
The relationship between the mechanical (or added electrostatic) filtration efficiency of the middle layer of the filter medium and the filling rate and the thickness of the filter layer calculated by a numerical model at a flow rate of 30 L/min.