Graphical Representation of Welded, Soldered and Brazed Joints; Concepts and Terms for Soldered and Brazed Joints and Seams
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 05/01/1981

Graphical Representation – Welding, soldering – Part 4: Concepts and Terms for Soldered and Brazed Joints and Seams
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 04/01/2017