Metal flow is a very inhomogeneous process during backward extrusion of complex box body, Relative shape and size of the blank is a key factor which affect metal flow.
复杂盒形零件的反挤压是一个极其不均匀的流动过程 ，坯料的相对形状及尺寸是影响金属流动的关键因素。
2
Relative porosity factor value can be used to characterize the relation between the molecular size of the polymer and the its retention in the flow of polymer solution through porous media.