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Priority to JP1975139801UpriorityCriticalpatent/JPS5528330Y2/ja
Publication of JPS5255938UpublicationCriticalpatent/JPS5255938U/ja
Application grantedgrantedCritical
Publication of JPS5528330Y2publicationCriticalpatent/JPS5528330Y2/ja
B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
