Aerospace; acceptance testing of fusion welding jigs; and auxiliary equipment accuracy of control and movement
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 03/01/1984

Aerospace – Acceptance testing of fusion welding jigs and auxiliary equipment – Accuracy of control and movement
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 09/01/2016