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Priority to JP6266667UpriorityCriticalpatent/JPS4810700Y1/ja
Priority to US745472Aprioritypatent/US3610231A/en
Priority to GB1231015Dprioritypatent/GB1231015A/en
Priority to DE19681766809prioritypatent/DE1766809B1/de
Publication of JPS4810700Y1publicationCriticalpatent/JPS4810700Y1/ja