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GB/T 9711 2017 English PDFThe standard instead of GB/T 9711 2011 "oil and gas industry pipeline conveyor system with steel pipe." With GB/T 9711 2011 In addition to editorial changes, the main technical changes are as follows.

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GB/T 9711 2017 English PDFThe standard instead of GB/T 9711 2011 "oil and gas industry pipeline conveyor system with steel pipe." With GB/T 9711 2011 In addition to editorial changes, the main technical changes are as follows.

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supplier of GB T 9711 L690 weld pipe,A36,Q235B,Q345B steel Home >Product list > GB T 9711 L690 weld pipe. p235gh Boiler and Pressure Vessel Steel Plate. P235GH is a kind of material for pressure purpose. The normal delivery condition is Normalizing.

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