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Priority to DD16730772ApriorityCriticalpatent/DD100168A1/xx
Publication of DD100168A1publicationCriticalpatent/DD100168A1/xx
Priority to DE19732355248prioritypatent/DE2355248A1/de
Priority to FR7343336Aprioritypatent/FR2209621B3/fr
B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
B21D1/00—Straightening, restoring form or removing local distortions of sheet metal or specific articles made therefrom; Stretching sheet metal combined with rolling