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Priority to JP12361686UpriorityCriticalpatent/JPS6330632U/ja
Priority to US07/184,638prioritypatent/US4938729A/en
Priority to PCT/JP1987/000587prioritypatent/WO1988001354A1/ja
Publication of JPS6330632UpublicationCriticalpatent/JPS6330632U/ja