DIN 4003-89
DIN 4003-89 Concept for the design of 3D models based on properties according to DIN 4000 - Part 89: Adaptive items for tools and extenders
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 12/01/2013
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 12/01/2013