DIN 20379-1 - DRAFT
DIN 20379-1 - DRAFT Draft Document - Rock drilling - Part 1: Tapered bits for percussive flush drilling
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 02/01/2010
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 02/01/2010