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Priority claimed from DE2758661Aexternal-prioritypatent/DE2758661C2/de
Priority claimed from CS834578Aexternal-prioritypatent/CS250201B2/cs
Application filed by Gewerk Eisenhuette WestfaliafiledCriticalGewerk Eisenhuette Westfalia
Priority to CS40581ApriorityCriticalpatent/CS274509B2/cs
Publication of CS40581A2publicationCriticalpatent/CS40581A2/cs
Publication of CS274509B2publicationCriticalpatent/CS274509B2/cs