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Priority to JP13452075UpriorityCriticalpatent/JPS5518556Y2/ja
Priority to US05/697,123prioritypatent/US4111615A/en
Priority to CA255,181Aprioritypatent/CA1064209A/en
Publication of JPS5253405UpublicationCriticalpatent/JPS5253405U/ja
Application grantedgrantedCritical
Publication of JPS5518556Y2publicationCriticalpatent/JPS5518556Y2/ja