鋁方管 鋁合金管空心扁管鋁型材1系鋁合金:10601050 10701100,1050-O,1060-O,1060H24,1050H24,1070-O...2系鋁合金:LY12LY12CZLY12M2A122A12-O2A12-T4 2A14,2A14T4 ...
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