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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过程,阐述了改进模具具体措施和生产时结果.

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counter-deed, counterdemand, counterdemonstrate, counterdemonstration, counterdevice, counterdie, counter-doping, counter-down, counterdrain, counterdraw,

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3G, 401(K), a,

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