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Priority to JP13527587UpriorityCriticalpatent/JPS6440708U/ja
Priority to GB8818312Aprioritypatent/GB2207646B/en
Priority to US07/227,271prioritypatent/US4881752A/en
Priority to DE3826232Aprioritypatent/DE3826232A1/de
Publication of JPS6440708UpublicationCriticalpatent/JPS6440708U/ja