Home / Standards / GB/T 20957.4-2007 GB/T 20957.4-2007 Active Test conditions for precision machining centres - Part 4：Accuracy and repeatability of positioning of linear and rotary axes 精密加工中心检验条件 第4部分：线性和回转轴线的定位精度和重复定位精度检验 Standard Type GBT ICS 25.040.10 CCS J54 Status 现行 Issue Date 2007-07-26 Implementation 2007-12-01 Responsible Dept 中国机械工业联合会 Drafting Unit N/A