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Priority to JP2549381UpriorityCriticalpatent/JPS57138689U/ja
Priority to US06/341,727prioritypatent/US4410290A/en
Priority to GB8202096Aprioritypatent/GB2092074B/en
Priority to DE19823202436prioritypatent/DE3202436A1/de
Priority to FR8201261Aprioritypatent/FR2500792A1/fr
Publication of JPS57138689UpublicationCriticalpatent/JPS57138689U/ja