NA 121

DIN Standards Committee Tools and Clamping Devices

DIN 20317 [Withdrawn] references following documents:

Document number Edition Title
DIN 20301 1999-01 Rock drilling operations - Terminology, units, and symbols for use in formulae More 
DIN 20302 1974-02 Rock drilling equipment; terminology More 
ISO 10208 1991-02 Rock drilling equipment; left-hand rope threads More