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Patent-Anspruch:Patent claim:Ein Feilenheft, dessen Zwinge b mit Muttergewinde versehen ist, in Verbindung mit dem
einschraubbaren Futter c, dessen innere Bohrung für die Aufnahme der Feilenangel mit
Holz ausgebuchst ist.A file handle, the ferrule b of which is provided with a nut thread, in connection with the screw-in chuck c, the inner bore of which is bulged with wood to accommodate the file tang.