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Application filed by Veb Schwerter Emaillierwerke LauterfiledCriticalVeb Schwerter Emaillierwerke Lauter
Publication of RO85487ApublicationCriticalpatent/RO85487A/fr
Publication of RO85487BpublicationCriticalpatent/RO85487B/ro
Method for the self-monitoring of an opto-electronic crack detection device, particularly by the magnetic-powder method, and device for carrying out this method