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Priority to JP11259776UpriorityCriticalpatent/JPS5330117U/ja
Priority to GB1726779Aprioritypatent/GB1586056A/en
Priority to DE19772759969prioritypatent/DE2759969C2/de
Priority to DE19772737076prioritypatent/DE2737076A1/de
Publication of JPS5330117UpublicationCriticalpatent/JPS5330117U/ja