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Priority to JP18802082UpriorityCriticalpatent/JPS5994427U/ja
Priority to US06/561,248prioritypatent/US4586391A/en
Publication of JPS5994427UpublicationCriticalpatent/JPS5994427U/ja
Application grantedgrantedCritical
Publication of JPS6348983Y2publicationCriticalpatent/JPS6348983Y2/ja