Home / Standards / GB/T 20324-2006 GB/T 20324-2006 Active Circular dies for parallel pipe threads - G series G系列圆柱管螺纹圆板牙 Standard Type GBT ICS 25.100.50 CCS J41 Status 现行 Issue Date 2006-07-20 Implementation 2007-01-01 Responsible Dept 中国机械工业联合会 Drafting Unit N/A