利用有限元软件模拟钢管挤压穿孔过程。
The perforation process of steel tube extrusion is simulated by finite element software.
挤压机穿孔针是穿孔系统的主要部件之一，决定着挤压机所挤压制品的质量。
Placing rod is one of the most important parts of perforation system. It decides the quality of extrusion products.
穿地龙机器人是一种可在土中挤压穿孔前进的装置。
Dragon of puncturing mud robot is a kind of device that can go ahead and extrude hole in the mud.
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