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防腐螺旋管

  • 3pe防腐螺旋鋼管

    3pe防腐螺旋鋼管

    在生產過程中, 3pe防腐螺旋鋼管的橢圓度不可避免,但能把橢圓度減下來,假如橢圓度太大,在施工中會帶來很大麻煩。橢圓度是3pe防腐螺旋鋼管在成型過程中因設備精度
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