新制定的分型标准为是否有假性动脉瘤形成、是否有附壁血栓形成及是否有内膜片的扭曲。
The first recognizable abnormality is increased tortuosity and thickening of the arteries which may compress the underlying veins.首先见到的改变是动脉弯曲度的增加和管壁的增厚,它可压迫其下面的静脉。
During variation rules of porosity, permeability and other physical properties were analyzed quantitatively, we suppose the tortuosity has no change.通常在定量分析孔隙度、渗透率等物性参数变化规律时,往往假设迂曲度不发生变化。