标准摘要 Cross Reference: AMS2486,AMS2759/3,AMS4928,AMS5639,AMS5659,AMSQQP416,ANSI Y14.5M,ARP4296,AS1376,AS1790,AS1791,AS478J,ASME B46.1,ASME Y14.36M 展开完整摘要 英文名称FITTING ASSY, ELBOW, REDUCER, 90°, SWIVEL, REDUCED BODY, FLARELESS