标准摘要 Cross Reference: AMS2417,AMS5520,AMS5520D,ASTMA568,ASTMA682,ASTMB194,ASTMB695,DOD-P-16232,FED-QQ-P-35,FED-QQ-P-416 展开完整摘要 英文名称RING, RETAINING, EXTERNAL, INTERLOCKING