China 'GB/T 25667.2-2010
' standard english version:
NATIONAL STANDARD OF THE PEOPLE'S REPUBLIC OF CHINA
GB/T 25667.2-2010
Solid carbide twist drills with parallel shank Part2: The types and dimensions for parallel shank twist drills with 2°anguar fiants 整体硬质合金直柄麻花钻 第2部分:2°斜削平直柄麻花钻型式与尺寸
Issued Date:2010-12-23
Implemented Date:2011-07-01
Issued by:
The Standardization Administration of the People's Republic of China