
Subland twist drills with Morse taper shanks for holes prior to tapping screw threads
出版:International Organization for Standardization

专家解读视频
NF ISO 3438:2004 - Identical
BS ISO 3438:2003 - Identical
UNI 7656:1977 - Equivalent
GB/T 6138.2-2007 - Modified
NS 5344 Ed. 1 (1977) - Identical