backward extrusion造句

Effect of billet temperature on the backward extrusion of az31 mg alloy
31镁合金反挤成形的影响
Experimental study on integral cold backward extrusion technology of flat hook - commutator
平面钩型换向器整体反挤压工艺实验研究
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
摘要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。
It's difficult to find backward extrusion in a sentence. 用backward extrusion造句挺难的