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Priority to JP13380980UpriorityCriticalpatent/JPS6231659Y2/ja
Priority to CA000378911Aprioritypatent/CA1156887A/en
Priority to DE3122769Aprioritypatent/DE3122769C2/de
Priority to US06/274,678prioritypatent/US4430099A/en
Publication of JPS5757254UpublicationCriticalpatent/JPS5757254U/ja
Application grantedgrantedCritical
Publication of JPS6231659Y2publicationCriticalpatent/JPS6231659Y2/ja