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Priority to JP8224385UpriorityCriticalpatent/JPS61198130U/ja
Priority to US06/819,640prioritypatent/US4668010A/en
Priority to DE19863605145prioritypatent/DE3605145A1/de
Priority to GB08604707Aprioritypatent/GB2171300B/en
Publication of JPS61198130UpublicationCriticalpatent/JPS61198130U/ja