标准摘要 Cross Reference: AMS4150,AMS4921,AMS5656,ANSI/ASME/B46.1,ANSI/Y14.36,ARP4296,AS4459,ASME/Y14.5M,ASTME1417,FED-QQ-P-35,MIL-C-5541 展开完整摘要 英文名称FITTING, ELBOW, 90°, EXTERNAL SWAGE, HYDRAULIC