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Priority to JP20043384UpriorityCriticalpatent/JPS61112324U/ja
Priority to DE3530916Aprioritypatent/DE3530916C2/de
Priority to US06/771,279prioritypatent/US4669845A/en
Priority to GB08521833Aprioritypatent/GB2165952B/en
Publication of JPS61112324UpublicationCriticalpatent/JPS61112324U/ja