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DIN 333:1986
60? centre drills; types R, A, and B
The standard specifies dimensions, designation, material, execution and marking of centre drills for centre holes 60ø according to DIN 332 part 1.
Deutsches Institut für Normung [din]
The standard specifies dimensions, designation, material, execution and marking of centre drills for centre holes 60ø according to DIN 332 part 1.