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Application filed by 山本ビニタ−株式会社filedCritical山本ビニタ−株式会社
Priority to JP12638382UpriorityCriticalpatent/JPS5930247U/ja
Publication of JPS5930247UpublicationCriticalpatent/JPS5930247U/ja
Application grantedgrantedCritical
Publication of JPS622061Y2publicationCriticalpatent/JPS622061Y2/ja
Werkwijze voor het vervaardigen van voor snelle rotatie bestemde grote stalen delen zonder opening in het hart en met een cirkelvormige dwarsdoorsnede.