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Publication of AT262917BpublicationCriticalpatent/AT262917B/de
E21C27/00—Machines which completely free the mineral from the seam
E21C27/02—Machines which completely free the mineral from the seam solely by slitting
AT1039765A1965-01-021965-11-18Walzenschrämmaschine, insbesondere für den Abbau mächtiger Flöze, und Verfahren zum Abbau von Flözen mittels derselben
AT262917B
(de)