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Priority to JP5608979UpriorityCriticalpatent/JPS615899Y2/ja
Priority to GB8013725Aprioritypatent/GB2047980B/en
Priority to DE19803016086prioritypatent/DE3016086A1/de
Publication of JPS55156569UpublicationCriticalpatent/JPS55156569U/ja
Application grantedgrantedCritical
Publication of JPS615899Y2publicationCriticalpatent/JPS615899Y2/ja