Home / Standards / GB/T 4680-1997 GB/T 4680-1997 Abolished Horizontal internal broaching machines--Testing of the accuracy 卧式内拉床 精度检验 Standard Type GBT ICS 25.100.25 CCS J57 Status 废止 Issue Date 1997-04-07 Implementation 1997-10-01 Responsible Dept 中国机械工业联合会 Drafting Unit N/A