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CS 45DEG OR 90DEG ELBOW specifications Standards: ASME B16.9,MSS SP-43,DIN 2617,JIS B2313 ,GB/T12459,GB/T13401,SH3408,SH3409,HG/T21635,HG/T21631 Materials: Carbon Steel:ASTM A234 WPB WPC A105 A106 A53 ...