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Priority to JP12947587UpriorityCriticalpatent/JPS6434643U/ja
Priority to US07/216,359prioritypatent/US4914481A/en
Priority to DE8888110958Tprioritypatent/DE3869496D1/de
Priority to EP88110958Aprioritypatent/EP0298504B1/en
Publication of JPS6434643UpublicationCriticalpatent/JPS6434643U/ja