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HOT CuNi 90/10 JIS copper nickel C70600 butt welding long radius elbow Standard:ASME/ANSI B16.5/16.36/16.47A/16.47B, MSS S44, ISO70051, JISB2220, BS1560-3.1, API7S-15, API7S-43, API605, EN1092 ...