[国外标准] DIN 2155-2-2008 Core drills - Part 2 Technical specifications for shell core drills
[国外标准] DIN 2155-1-2008 Core drills - Part 1 Technical specifications for core drills with shank
[国外标准] JIS B4314-2002 Twist drills with milling cutters cylindrical shank-Dimensions
[国外标准] JIS B4308-1999 Spot drills
[国外标准] JIS B4304-2005 Centre drills for centre holes
[国外标准] JIS B0171-2005 Twist drills-Terms,definitions and types