porous Si多孔硅porousadj.可渗透的；多孔的porous polymer bead高分子多孔微球porous alumina film多孔氧化铝膜porous hollow fiber多孔中空纤维porous bronze parts多孔青铜零件porous distribution孔隙分布porous metal fibers金属纤维多孔材料porous flow process渗流过程porous medium model多孔介质模型porous metal filter多孔金属过滤器porous microspheres多孔球