China 'GB/T 6135.2-2008
' standard english version:
NATIONAL STANDARD OF THE PEOPLE'S REPUBLIC OF CHINA
GB/T 6135.2-2008
Parallel shank twist drills - Part 2: The types and dimensions for parallel shank stub series twisl drills and parallel shank jobber series twist drills 直柄麻花钻 第2部分:直柄短麻花钻和直柄麻花钻的型式和尺寸
Issued Date:2008-11-04
Implemented Date:2009-04-01
Issued by:
The Standardization Administration of the People's Republic of China