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Priority to JP1980013688UpriorityCriticalpatent/JPH0221277Y2/ja
Priority to US06/137,328prioritypatent/US4346392A/en
Priority to DE3013973Aprioritypatent/DE3013973C2/de
Publication of JPS56115294UpublicationCriticalpatent/JPS56115294U/ja
Application grantedgrantedCritical
Publication of JPH0221277Y2publicationCriticalpatent/JPH0221277Y2/ja