The problems existed in extrusion process of two sorts large section hollow extrusion profilesare introduced. The concrete measure and extrusion consequence of the improved prothole die are given.
介绍了两种大断面
空心型材在挤
过程中存在问题，阐述了改进挤
体
施和生
挤结果.
The problems existed in extrusion process of two sorts large section hollow extrusion profilesare introduced. The concrete measure and extrusion consequence of the improved prothole die are given.
介绍了两种大断面空心型材在挤过程中存在问题，阐述了改进挤体施和生挤结果.
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