China 'GB/T 21470-2008
' standard english version:
NATIONAL STANDARD OF THE PEOPLE'S REPUBLIC OF CHINA
GB/T 21470-2008
Machining allowances and tolerances for steel open die forgings on hammer - Disks, columns, rings and seamless cylindrical sleeves 锤上钢质自由锻件机械加工余量与公差 盘、柱、环、筒类
Issued Date:2008-02-28
Implemented Date:2008-08-01
Issued by:
The Standardization Administration of the People's Republic of China