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Priority to JP13058875UpriorityCriticalpatent/JPS5243830U/ja
Priority to US05/663,459prioritypatent/US4068924A/en
Priority to DE2608999Aprioritypatent/DE2608999B2/de
Priority to GB8729/76Aprioritypatent/GB1543252A/en
Publication of JPS5243830UpublicationCriticalpatent/JPS5243830U/ja