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Priority to JP20183884UpriorityCriticalpatent/JPS61110448U/ja
Priority to GB08531499Aprioritypatent/GB2170848B/en
Priority to DE19853545832prioritypatent/DE3545832A1/de
Priority to US06/813,282prioritypatent/US4653801A/en
Publication of JPS61110448UpublicationCriticalpatent/JPS61110448U/ja