方扁管. 規格m/m, 厚度m/m. 15*30, 1.5~2.0. 20*30, 1.5~2.0. 20*40, 1.5~3.0. 20*50, 1.5~2.0. 20*100, 1.5~2.0. 25*50, 1.5~3.0. 25*75, 1.5~3.0. 30*50, 1.5~3.0.
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