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Priority to JP4327472UpriorityCriticalpatent/JPS5529709Y2/ja
Priority to US00291538Aprioritypatent/US3815714A/en
Priority to GB4439072Aprioritypatent/GB1397619A/en
Priority to DE19722251032prioritypatent/DE2251032C3/de
Publication of JPS491750UpublicationCriticalpatent/JPS491750U/ja
Application grantedgrantedCritical
Publication of JPS5529709Y2publicationCriticalpatent/JPS5529709Y2/ja