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LR pipe elbow made in Yanshan 1.Material:Carbon steel:ASTM/ASME A234 WPB,WPC Alloy steel: ASTM/ASME A234 WP 1-WP 12-WP 11-WP 22-WP 5-WP 91-WP911,15Mo3 15CrMoV, 35CrMoV Stainless steel:ASTM/ASME A403 ...