超大铝管6061t5 上海现货铝合金管批发零割
2024-10-12
轻有色金属指密度小于4.5g/cm3的有色金属材料，包括铝、镁、钠钾钙锶钡等纯金属及其合金。这类金属的共同特点是：密度小(0.53～4.5g/cm3)，化学活性大，与氧、硫、碳和卤素的化合物都相当
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