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Priority to JP478779UpriorityCriticalpatent/JPS54100940U/ja
Publication of JPS54100940UpublicationCriticalpatent/JPS54100940U/ja
Method of and apparatus for manufacturing hollow metal bodies provided with a polyhedral head portion adapted to have a wrench or equivalent tool applied thereto
Method of and apparatus for manufacturing hollow metal bodies provided with a polyhedral head portion adapted to have a wrench or equivalent tool applied thereto