Home / Standards / GB/T 4020-1997 GB/T 4020-1997 Active Acceptance conditions for general purpose parallellathes--Testing of the accuracy 卧式车床 精度检验 Standard Type GBT ICS 25.080.10 CCS J53 Status 现行 Issue Date 1997-04-07 Implementation 1997-10-01 Responsible Dept 中国机械工业联合会 Drafting Unit N/A