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Priority to JP1976176247UpriorityCriticalpatent/JPS5620856Y2/ja
Priority to US05/859,463prioritypatent/US4234002A/en
Priority to GB51800/77Aprioritypatent/GB1562272A/en
Priority to DE2756273Aprioritypatent/DE2756273C2/de
Publication of JPS5391697UpublicationCriticalpatent/JPS5391697U/ja
Application grantedgrantedCritical
Publication of JPS5620856Y2publicationCriticalpatent/JPS5620856Y2/ja