China 'GB/T 20957.4-2007
' standard english version:
NATIONAL STANDARD OF THE PEOPLE'S REPUBLIC OF CHINA
GB/T 20957.4-2007
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
Issued Date:2007-07-26
Implemented Date:2007-12-01
Issued by:
The Standardization Administration of the People's Republic of China