• astm a106 gr.b sch40/sch80/sch120/schxxs steel tube & seamless pipe for structure/construction
  • astm a106 gr.b sch40/sch80/sch120/schxxs steel tube & seamless pipe for structure/construction

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  • astm a106 gr.b sch40/sch80/sch120/schxxs steel tube & seamless pipe for structure/construction
  • astm a106 gr.b sch40/sch80/sch120/schxxs steel tube & seamless pipe for structure/construction
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