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1·The geometrical similarity law in cross section was satisfied for the aluminum extruded tubes with a double hollow section.

具有双孔截面的铝合金挤压管的断面形状满足几何相似定律。

2·The system consists of a lightweight extruded aluminium perimeter section with integrated steel base plates.

该系统由一个轻量级的挤压铝综合钢铁基地板周长部分。

3·Aluminum extruded hollow profile with super large section is a kind of high efficiency profile, which is used for subway and other railway vehicles.

铝合金挤压特宽空心壁板型材是地铁、城市轨道交通车辆用经济断面型材。

4·While profile, the cross section was composed of annulus and rectangle, was extruded, the flow mechanism the plastic melt in the die was analyzed and the design method of die land was given.

本文分析了异型(圆环型与矩形的组合)材成型时塑料熔体在模头中的流动机理，并给出了模口成型长度的设计方法。

5·The morphology of cross section of extruded blends has been observed.

并用SEM观察了挤出条横截面的形态。