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Priority to JP18897386UpriorityCriticalpatent/JPS6393270U/ja
Priority to US07/104,182prioritypatent/US4804060A/en
Priority to GB8723385Aprioritypatent/GB2196915B/en
Priority to CA000549495Aprioritypatent/CA1293199C/en
Priority to FR8715300Aprioritypatent/FR2605945B1/fr
Publication of JPS6393270UpublicationCriticalpatent/JPS6393270U/ja
