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Priority to JP1978133224UpriorityCriticalpatent/JPS6222172Y2/ja
Priority to US06/055,956prioritypatent/US4262396A/en
Publication of JPS5549625UpublicationCriticalpatent/JPS5549625U/ja
Application grantedgrantedCritical
Publication of JPS6222172Y2publicationCriticalpatent/JPS6222172Y2/ja