试验结果表明： 泡孔的形成、形状及尺寸与胶粉颗粒的大小有关。
The results showed that the formation, shape and size of the cells had relations with the size of the rubber diameter.
孔形状因子与水泥石强度之间存在着较显著的相关性。
Correlations between strengths and micropore shape factor have been found.
本文提出预变形模具设计方法，它把模孔形状预先设计成与型材挤压时变形相反的方向，从而获得合格的挤压型材。
In this paper the predeformed designing method has been proposed, according to it, die holes should be predeformed with the direction opposite to that which tend to happen during extrusion practices.
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