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Priority to JP2716876UpriorityCriticalpatent/JPS52118679U/ja
Priority to GB9206/77Aprioritypatent/GB1577900A/en
Priority to US05/775,375prioritypatent/US4156276A/en
Priority to MX77168264Aprioritypatent/MX144283A/es
Publication of JPS52118679UpublicationCriticalpatent/JPS52118679U/ja