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Priority to JP10048586UpriorityCriticalpatent/JPS636431U/ja
Priority to US07/067,282prioritypatent/US4804992A/en
Priority to GB8715329Aprioritypatent/GB2192068B/en
Priority to DE3721557Aprioritypatent/DE3721557C2/de
Publication of JPS636431UpublicationCriticalpatent/JPS636431U/ja
Priority to GB9001629Aprioritypatent/GB2226149B/en