Home / Standards / GB/T 21945-2008 GB/T 21945-2008 Active Numerical control sector gear shaping machines - Testing of the accuracy 数控扇形齿轮插齿机 精度检验 Standard Type GBT ICS 25.040.20 CCS J56 Status 现行 Issue Date 2008-06-03 Implementation 2009-01-01 Responsible Dept 中国机械工业联合会 Drafting Unit N/A