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Priority to JP1979154187UpriorityCriticalpatent/JPS5736461Y2/ja
Priority to CA000363844Aprioritypatent/CA1141540A/en
Priority to GB8035930Aprioritypatent/GB2062543A/en
Publication of JPS5671771UpublicationCriticalpatent/JPS5671771U/ja
Application grantedgrantedCritical
Publication of JPS5736461Y2publicationCriticalpatent/JPS5736461Y2/ja