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ASTMA106Gr B ASTMA53 seamless steel pipe

ASTMA106Gr B ASTMA53 seamless steel pipe, Carbon steel pipe,Carbon Seamless steel pipeCHN Steel One of the Top 500 enterprises in China foreign trade. QCCO was approved as a member of “China Association for Contracting Projects Abroad “and granted a membership certificate on Sep 28,2005; “Credibility Rating AAA certificate in Foreign Trade” was granted to

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