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Priority to JP6145380UpriorityCriticalpatent/JPS6338957Y2/ja
Priority to US06/258,513prioritypatent/US4403371A/en
Priority to CA000376977Aprioritypatent/CA1176411A/en
Publication of JPS56168288UpublicationCriticalpatent/JPS56168288U/ja
Application grantedgrantedCritical
Publication of JPS6338957Y2publicationCriticalpatent/JPS6338957Y2/ja