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Priority to JP6192170UpriorityCriticalpatent/JPS4923498Y1/ja
Priority to US155195Aprioritypatent/US3697789A/en
Priority to CH909171Dprioritypatent/CH909171A4/xx
Priority to DE2131002Aprioritypatent/DE2131002C3/de
Priority to CH909171Aprioritypatent/CH556049A/xx
Publication of JPS4923498Y1publicationCriticalpatent/JPS4923498Y1/ja