24. January 2017 CONTRIBUTION TO THE 1st SEMINAR OF THE TECHNICAL COMMITTEE FOR SURFACE CRACK TESTING OF THE DGZFP 2015 (GERMAN SOCIETY OF NON-DESTRUCTIVE TESTING) CONTRIBUTION TO THE 1st SEMINAR OF THE TECHNICAL COMMITTEE FOR SURFACE CRACK TESTING OF THE DGZFP 2015 (GERMAN SOCIETY OF NON-DESTRUCTIVE TESTING)
