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Priority to JP1976126041UpriorityCriticalpatent/JPS6144209Y2/ja
Priority to US05/831,674prioritypatent/US4166692A/en
Priority to DE19772741399prioritypatent/DE2741399A1/de
Publication of JPS5342644UpublicationCriticalpatent/JPS5342644U/ja
Application grantedgrantedCritical
Publication of JPS6144209Y2publicationCriticalpatent/JPS6144209Y2/ja