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Priority to JP1980019298UpriorityCriticalpatent/JPS6231695Y2/ja
Priority to GB8104886Aprioritypatent/GB2072775B/en
Priority to US06/234,758prioritypatent/US4369862A/en
Publication of JPS56120431UpublicationCriticalpatent/JPS56120431U/ja
Application grantedgrantedCritical
Publication of JPS6231695Y2publicationCriticalpatent/JPS6231695Y2/ja