TCVN 5838-1994 Aluminium and aluminium alloys Rods bars tubes and profiles General technicalrequirements《铝和铝合金 棒材 条材 管材和型材 一般技术要求》.pdf

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TCVN 5839-1994 Aluminium and aluminium alloys Rods bars tubes and profiles Mechanical properties《铝和铝合金 棒材 条材 管材和型材 机械性能》.pdf

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