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Priority to JP4348779UpriorityCriticalpatent/JPS604285Y2/ja
Priority to CA000349244Aprioritypatent/CA1149936A/en
Publication of JPS55144645UpublicationCriticalpatent/JPS55144645U/ja
Application grantedgrantedCritical
Publication of JPS604285Y2publicationCriticalpatent/JPS604285Y2/ja