Home / Standards / GB/T 20328-2006 GB/T 20328-2006 Abolished Circular dies for taper pipe threads - R series R系列圆锥管螺纹圆板牙 Standard Type GBT ICS 25.100.50 CCS J41 Status 废止 Issue Date 2006-07-20 Implementation 2007-01-01 Responsible Dept 中国机械工业联合会 Drafting Unit 中国机械工业联合会