
Subland twist drills for holes prior to tapping screw threads—Part 1:The types and dimensions for subland twist drills with parallel shanks
NORM herausgegeben am 28.8.1997
Designation standards: GB/T 6138.1-1997
Note: UNGÜLTIG
Publication date standards: 28.8.1997
Country: Chinese technical standard
Kategorie: Technische Normen GB