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carbon steel BUTT WELD elbow with different angles Specifications Product Description NAME ELBOW MATERIAL Cr5Mo,12Cr1MoV,10CrMo910,15CrMo,12Cr2Mo1,A335P22,St45.8Ⅲ, A10bB A234-WPB.A420-WPL6.A234-WP12...