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Priority to JP6109576UpriorityCriticalpatent/JPS52151795U/ja
Priority to US05/780,153prioritypatent/US4108296A/en
Priority to GB12147/77Aprioritypatent/GB1575365A/en
Priority to DE19772715403prioritypatent/DE2715403A1/de
Publication of JPS52151795UpublicationCriticalpatent/JPS52151795U/ja