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        牌號 壁厚/mm  狀態 抗拉強度Rm/Mpa不小于 伸長率/%,不小于 執行標準
        A A50
        N4 DN 所有壁厚 M 390 35 GB/T2882-2005
        Y 540
        N6 <0.9 M 390
        Y 540
        0.9 M 370 35
        Y2 450 12
        Y 520 6
         NCu40-2-1 NCu28-2.5-1.5 NSi0.19 NMg0.1 所有規格 M 440 20
        Y2 540 6
        Y 585 3

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