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Priority to JP1987112723UpriorityCriticalpatent/JPS6419112U/ja
Priority to GB8816715Aprioritypatent/GB2208318B/en
Priority to DE3824990Aprioritypatent/DE3824990A1/de
Priority to US07/222,751prioritypatent/US4898031A/en
Publication of JPS6419112UpublicationCriticalpatent/JPS6419112U/ja