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。

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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。

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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。

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