Home / Standards / GB/T 62.1-2004 GB/T 62.1-2004 Active Wing nuts--Round wing 蝶形螺母 圆翼 Standard Type GBT ICS 21.060.20 CCS J13 Status 现行 Issue Date 2004-02-10 Implementation 2004-08-01 Responsible Dept 中国机械工业联合会 Drafting Unit N/A