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
过程中存在问题，阐述了改进
具具体
施和生产
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过程中存在问题，阐述了改进具具体施和生产结果.
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