Frame: Lightweight aluminum frame, made from custom extruded profiles.

框架：轻量级的铝制框架，从定制挤压型材制成。

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It is a reference for anybody concerning quality of wrought aluminium alloy extruded profiles for architecture.

为关注铝合金建筑型材质量的各方提供参考。

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English Name:Aluminium and aluminium alloys - Extruded rod/bar, tube and profiles - Part 8: Porthole tubes, tolerances on dimensions and form;

简体中文标题：铝和铝合金。挤压棒材、管材和型材。第8部分：带孔管材。尺寸和形状公差。

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