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Priority to JP10974080UpriorityCriticalpatent/JPS6215772Y2/ja
Priority to US06/280,051prioritypatent/US4421385A/en
Priority to DE3129502Aprioritypatent/DE3129502C2/de
Publication of JPS5732956UpublicationCriticalpatent/JPS5732956U/ja
Application grantedgrantedCritical
Publication of JPS6215772Y2publicationCriticalpatent/JPS6215772Y2/ja