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Priority to JP5171773UpriorityCriticalpatent/JPS5744490Y2/ja
Priority to GB1763974Aprioritypatent/GB1473345A/en
Priority to DE19742420502prioritypatent/DE2420502A1/de
Publication of JPS502324UpublicationCriticalpatent/JPS502324U/ja
Application grantedgrantedCritical
Publication of JPS5744490Y2publicationCriticalpatent/JPS5744490Y2/ja