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Priority to JP3493170UpriorityCriticalpatent/JPS4820181Y1/ja
Priority to US00130577Aprioritypatent/US3759555A/en
Priority to DE2117085Aprioritypatent/DE2117085C3/de
Priority to FR7112987Aprioritypatent/FR2089580A7/fr
Publication of JPS4820181Y1publicationCriticalpatent/JPS4820181Y1/ja