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Application filed by Alberto Calmes, Emilio DvorakfiledCriticalAlberto Calmes
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Publication of AT168279BpublicationCriticalpatent/AT168279B/de
Kontinuierliches elektrisches Stumpfnaht-Schweißverfahren zur Herstellung von Rundoder Profilrohren und Einrichtung zur Durchführung dieses Verfahrens.